Sankagiri Fort: The Fourteen-Walled Citadel That Guarded Kongu Nadu
On a hill that rises 707 metres above the plains of western Tamil Nadu, a fortress of extraordinary design has watched over the Kongu country for over six centuries. Sankagiri Fort is not a single walled enclosure—it is fourteen concentric fortifications wrapped around a steep granite hill, each layer designed to slow, confuse, and destroy any army that dared to approach.
The British called it a “death well.” Tipu Sultan used it as a military base. The Vijayanagara emperors built its core. And on its ramparts, one of India’s earliest freedom fighters met his end.
This is the story of Sankagiri Fort—the fourteen-walled citadel that guarded the gateway to Kongu Nadu.
The Pillar of the Sky: A Natural Fortress
The name Sankagiri carries the weight of geology and history. Sanku means “conch” or “pillar” in Tamil, and giri means “hill.” The rock rises like a pillar from the surrounding plains, its summit visible for miles across the flatlands of Salem district.
The hill’s natural defences are extraordinary. Three sides are sheer granite cliffs, impossible to climb without ropes and ladders. Only the eastern slope offers a feasible approach—and even that is steep enough to exhaust any attacker before they reach the first gate. The summit stands 707 metres above sea level, towering 280 metres above the town below.
The Vijayanagara engineers who selected this site in the 15th century knew exactly what they were doing. They had seen how the Cholas and Pandyas used hill forts to dominate the plains. They had learned from the great rock fortresses of the Deccan. Sankagiri would be their masterpiece—a fort that could hold a garrison of thousands, store taxes from an entire region, and resist siege for years.
Today, the fort covers 558 acres of hill and slope, its fourteen walls climbing the rock in a series of concentric rings. To reach the summit, a visitor must pass through eleven gates, each one a smaller and more defensible version of the last. It is a military architecture that prioritises depth over height—not one wall, but fourteen, each one a fresh obstacle for any invader.
Before the Fort: The Land of the Adiyamans
Long before the Vijayanagara army arrived, the hill of Sankagiri was already sacred. The region was known as Mazhanadu—the land of the Mazhavar chieftains who ruled this part of Kongu Nadu during the Sangam age.
The Sangam poems speak of the Adiyaman dynasty, who controlled the passes through the Eastern Ghats from their base at nearby Dharmapuri. These chieftains were famous for their patronage of poets and their resistance to the Chera and Chola kings. The poet Avvaiyar, who walked the length of Tamil country, was a close friend of Adiyaman Neduman Anji.
The region around Sankagiri was also called Kundrathur—”the village of the hill.” The rock was a natural landmark, a place where travellers rested and armies camped. Local chieftains maintained watchtowers on its slopes, scanning the plains for invading armies from Mysore or the northern Deccan.
The Cholas conquered Kongu Nadu in the 10th century, incorporating the region into their vast empire. The Pandyas took control after the Chola decline in the 13th century. Then came the Delhi Sultanate, whose armies under Malik Kafur swept through Tamil country, looting temples and destroying kingdoms. The Madurai Sultanate ruled the region briefly before being overthrown by the Vijayanagara army in 1378.
By the early 15th century, the Vijayanagara Empire was at its peak. Its emperors looked south and saw a region still recovering from the chaos of the Sultanate years. They needed strong forts to secure their southern frontier. Sankagiri would become one of their most important outposts.
The Vijayanagara Foundation: Building the Citadel
The Vijayanagara Empire constructed Sankagiri Fort in the early 15th century as a strategic military outpost. The emperor chose the site for its natural defences and its position commanding the trade routes between the Coromandel coast and the Malabar coast.
The initial construction focused on the summit. The Vijayanagara engineers carved a flat area from the granite peak, creating space for a garrison, a magazine, and a small temple. They built the first walls around this summit, using granite blocks laid without mortar in the traditional Tamil style.
The fort’s most distinctive feature—the fourteen concentric walls—was not built all at once. The Vijayanagara rulers built the inner rings, creating a core citadel that could be defended by a small garrison. Later rulers added additional walls, each one extending further down the slope, until the entire hill was encircled fourteen times.
This layered defence was a response to the artillery that had changed warfare across India. A single thick wall could be breached by cannon fire. But fourteen walls, each one requiring a fresh assault, each one providing cover for defenders to retreat behind—that was a different problem entirely. An attacker would have to capture each wall in sequence, losing men and momentum at every step.
The Vijayanagara garrison at Sankagiri was responsible for the Kongu Nadu region—the fertile western plains that produced textiles, spices, and agricultural wealth. From this perch, the emperor’s officers collected taxes, monitored trade, and kept the peace among the local chieftains known as the palayakkarars.
The Nayak Transition: From Governors to Kings
The Battle of Talikota in 1565 shattered the Vijayanagara Empire. The great capital of Hampi was sacked, and the emperor was killed. In the chaos that followed, the Nayak governors who had ruled the empire’s provinces declared their independence.
The Madurai Nayaks—who had governed the southern Tamil country—became the dominant power in the region. Their kingdom stretched from the tip of the peninsula to the borders of Kongu Nadu. Sankagiri Fort passed into their control, becoming a northern outpost of the Madurai Nayak kingdom.
The Nayaks reinforced the fortifications, adding additional walls and strengthening the existing ones. They understood that Sankagiri was the gateway to their kingdom from the north. Any army invading from Mysore or the Deccan would have to capture Sankagiri before advancing on Madurai.
The Nayak period also saw the construction of the Varadaraja Perumal temples within the fort. Two temples dedicated to Vishnu were built on the hill—one at the summit and another on the lower slopes. These temples served the spiritual needs of the garrison and the local population, their sanctums facing east toward the rising sun.
The Nayaks also built the granaries and water reservoirs that made the fort self-sufficient. The granaries could store enough grain to feed a garrison through a year-long siege. The reservoirs—carved directly into the granite—collected monsoon rainwater and sustained the defenders through the dry summer months.
But the Nayak kingdom was weakening. By the late 17th century, the Madurai Nayaks were fighting a losing battle against their neighbours—the Marathas of Thanjavur, the Nawabs of Arcot, and the rising power of Mysore. Sankagiri would soon change hands again.
The Maratha Interlude: A Refuge for the Chettiars
In the late 17th century, the Marathas entered the Carnatic. Ekoji, the half-brother of the great Shivaji Maharaj, established the Thanjavur Maratha kingdom in 1674. His domain expanded to include parts of Kongu Nadu, and Sankagiri Fort came under Maratha control.
The Maratha period is remembered for a remarkable story of survival. According to local tradition, the Maratha king ordered the execution of all Chettiar men in the region. The reasons are lost to history—perhaps a financial dispute, perhaps a rebellion. But the Chettiar elders devised a desperate plan.
They gathered 500 children from their community and secretly moved them to the Sankagiri region. These children, hidden in the shadow of the fort, became the “Five Hundred Kongu Chettiars”—the founders of a new community that would survive to this day.
The Chettiars, being devotees of Lord Shiva, built a temple to Kopineshwar (Shiva) and Angayarkanni (a form of Meenakshi) near Sankagiri. They named the deity after the Maratha lord Kopineshwar of Thane, hoping to placate the king if he discovered their survival. The dilapidated remains of this temple are still visible on the road to Idapadi.
The Maratha control of Sankagiri was short-lived. The Mysore kingdom under Hyder Ali was expanding aggressively, and the fort’s strategic position made it a prime target. By the 1760s, Sankagiri had fallen to Mysore.
The Mysore Era: Hyder Ali and Tipu Sultan
Hyder Ali, the brilliant commander who rose from obscurity to become the de facto ruler of Mysore, captured Sankagiri Fort during his campaigns in the Carnatic. He immediately recognized its value.
The fort’s topography—steep cliffs on three sides, a single approach on the east—made it ideal for defence. Hyder Ali strengthened the fortifications and stationed a garrison on the summit. He also built two mosques within the fort, catering to the religious needs of his Muslim soldiers.
When Hyder Ali died in 1782, his son Tipu Sultan inherited the kingdom—and Sankagiri Fort. Tipu used the fort as a military base for operations against the British in the Carnatic. Its commanding view of the plains allowed his scouts to detect British troop movements from Madras. Its fourteen walls provided a safe haven for his rocket corps, who tested their deadly weapons on the slopes of the hill.
Tipu also strengthened the fort’s water supply. The rock had natural springs and rainwater catchments, but Tipu added more reservoirs, ensuring the garrison could withstand a prolonged siege. He built the “death well”—a deep pit used for executions—and the granaries that stored food for his soldiers.
But Tipu’s star was fading. The Third Anglo-Mysore War (1790-1792) ended in defeat, and the Treaty of Srirangapatinam forced Tipu to cede half his territory to the British. In 1791, during the war, British forces under Major Gowdie captured Sankagiri Fort from Tipu’s garrison. The capture was swift—the defenders, cut off from Tipu’s main army, could not hold the rock against British artillery.
The treaty of 1792 formally ceded Sankagiri to the British East India Company. Tipu’s reign over the fort was over.
Dheeran Chinnamalai: The Kongu Chieftain Who Defied the British
The most dramatic chapter in Sankagiri’s history involves a man who was not a king, but a palayakkarar—a chieftain who ruled a small territory in the Kongu country.
Dheeran Chinnamalai was born Theerthagiri Gounder on 17 April 1756 in Melapalayam Palayakottai, near present-day Kangeyam. He was a palayakkarar—a chieftain responsible for administering a small territory and maintaining a military force for the regional ruler.
His confrontation with authority began not with the British, but with Hyder Ali of Mysore. According to local tradition, a Diwan (minister) appointed by Hyder Ali and a tax collector were troubling the farmers of Kongu Nadu, confiscating their land when they could not pay. Theerthagiri and his two brothers intercepted the Diwan on the road between Sivan Malai and Cheeni Malai, recovered all the taxes, and distributed them back to the farmers. The Diwan protested that the taxes belonged to Hyder Ali. Theerthagiri replied that the Kongus could rule themselves and did not need a Mysore king.
The story spread through the villages, and the people named him Chinnamalai—”the young mountain” or “the brave lion”—for his fearless defiance. When the Diwan sent soldiers from Sankagiri to punish him, Chinnamalai met them at the Noyyal River and defeated them. This was his first battlefield experience.
When Hyder Ali died in 1782, his son Tipu Sultan called upon the Kongu chieftains to join him in fighting the British. Chinnamalai raised a regiment of 1,000 young Kongus and joined Tipu’s army. The French, who were allied with Tipu, trained the Kongu soldiers in modern military tactics.
Chinnamalai fought alongside Tipu Sultan in the Third Anglo-Mysore War. His soldiers fought bravely at the Malavalli front, inflicting severe damage on the British forces. But the war ended in defeat for Tipu. In the Fourth Anglo-Mysore War in 1799, Tipu was killed defending his capital of Srirangapatinam.
After Tipu’s death, Chinnamalai returned to Kongu Nadu. He built a palace and a fort at Odanilai, near present-day Erode, and refused to accept British authority. He advocated for all the Kongu chieftains to unite against the colonial power.
The British, who now controlled the Carnatic, demanded that Chinnamalai accept their hegemony and pay taxes. He refused. The British sent a troop under Colonel Makiskan to capture him. Forewarned by a spy in the British camp, Chinnamalai met the British on the banks of the Noyyal River and defeated them thoroughly. Makiskan was beheaded in the battle.
The British responded with a cavalry unit under Captain Harris. Chinnamalai, using a hand grenade to startle Harris’s horse, caused pandemonium in the British ranks and defeated them at Arachalur in 1804.
But the British were relentless. They brought cannons and demolished Chinnamalai’s fort at Odanilai. Chinnamalai and his two brothers—their names preserved in memory but lost to the written record—fled to the forests of Karumalai near Palani, hiding in the thick jungle.
They were betrayed by their own cook, Nallappan, who was tempted by a bribe. The cook informed the British of the brothers’ hiding place and their daily routine. Chinnamalai and his brothers were captured.
On 31 July or 2 August 1805—the exact date varies between sources—Dheeran Chinnamalai and his two brothers were hanged at Sankagiri Fort by the British East India Company.
The execution took place in the presence of hundreds of Kongu villagers, who were brought to the fort to witness the fate of those who defied the Company. The site of the execution was a large well within the fort—the “death well” that still stands today.
Chinnamalai’s body was buried at Odanilai, near his palace. But his memory lived on. He is remembered as one of the earliest freedom fighters in Indian history—a man who took up arms against the British a half-century before the Sepoy Mutiny of 1857.
In modern Tamil Nadu, Dheeran Chinnamalai is honoured with statues, memorials, and an annual commemoration at Sankagiri Fort. His story is taught in schools. His name is invoked whenever Tamils speak of resistance against colonial rule.
The British Era: Tax Storage for Kongu Nadu
After Tipu Sultan’s defeat and the execution of Chinnamalai, the British East India Company consolidated control over the Carnatic. Sankagiri Fort became a key administrative centre for the company.
The fort’s fourteen walls and secure location made it an ideal treasury. The British used the fort as a tax storage facility for the entire Kongu Nadu region—the districts of Salem, Erode, Coimbatore, Tiruppur, Namakkal, Karur, and Dindigul. Revenues collected from local agriculture and trade were brought to Sankagiri for safekeeping.
The British built additional structures to support this function. Two oil godowns stored cooking oil for the garrison and the local population. An explosives godown stored gunpowder and ammunition. A granary held grain for the soldiers and for distribution during famines. Administrative buildings housed the British officers and their Indian subordinates.
The British also added to the fortifications. The final phase of the fourteen walls was completed under British supervision, with the outer walls designed to resist artillery fire. The British garrison occupied the fort from 1799 until the mid-19th century.
The fort also served as a military cemetery. Two cemeteries within the walls—one for British soldiers, one for Muslim soldiers—contain the graves of those who died while stationed at Sankagiri. The gravestones, weathered by centuries of monsoon rain, still stand as silent witnesses to the colonial era.
By the mid-19th century, the strategic importance of hill forts had declined. The British withdrew the garrison, and Sankagiri Fort was abandoned as a military post. The tax records were moved to more accessible locations. The walls began to crumble.
But the fort never lost its significance. During the Indian independence movement, nationalists visited Sankagiri Fort to honour the memory of Dheeran Chinnamalai. The fort became a symbol of resistance—a reminder that Indians had fought the British long before Gandhi was born.
Sankagiri Fort and Fourteen Walls: A Military Masterpiece
The architectural genius of Sankagiri Fort lies in its fourteen concentric walls. No other fort in Tamil Nadu has this feature. Even the great Gingee Fort, with its three hills and thirteen-kilometre walls, does not have fourteen layers of fortification.
The walls are not parallel—they follow the contours of the hill, each one positioned to take advantage of the natural topography. The outer walls are lower, designed to slow an attacker and expose them to fire from the higher walls behind. The inner walls are higher and thicker, designed to be the final redoubt.
Between the walls are narrow passages that force attackers to move in single file—easy targets for defenders above. The passages are also exposed to the sun, which in the Tamil summer can kill a man in hours.
The Sankagiri fort has eleven gateways, each one smaller and more heavily defended than the last. The gates are positioned so that an attacker who breaches one gate finds themselves in a confined space, surrounded by walls, with the next gate still out of reach.
The “death well” is a deep pit located within the inner walls. According to tradition, prisoners condemned to death were thrown into the well. The British used it for executions, including—according to some accounts—the hanging of Dheeran Chinnamalai.
The granaries are still visible, their stone walls intact. The oil godowns and explosives godown stand as ruins, their roofs collapsed but their walls still standing. The two mosques built by Tipu Sultan are still maintained, their white domes visible from the town below. The two Varadaraja Perumal temples, built by the Nayaks, are now in ruins but still recognisable.
The cemeteries—British and Muslim—are overgrown but preserved. The headstones, carved with names and dates that have faded, tell the story of the soldiers who lived and died on this rock.
Visiting the Fourteen-Walled Citadel
Today, Sankagiri Fort is maintained by the Archaeological Survey of India as a protected monument. An entry fee is charged, and the fort is open to visitors daily.
The fort is located in Sankagiri town, in Salem district, approximately 22 kilometres from Erode and 38 kilometres from Salem. The nearest railway station is Sankagiri, a stop on the Salem-Erode line. The town is well-connected by road, with regular bus service from both Erode and Salem.
The climb to the summit takes 20 to 30 minutes. The path passes through the eleven gates, each one offering a glimpse of the walls and passages that once confounded attackers. The stairs are uneven, worn smooth by centuries of use. Sturdy shoes and plenty of water are essential.
At the summit, the view is breathtaking. To the east, the plains stretch toward Salem and beyond. To the west, the hills of the Western Ghats rise like a blue wall. Below, the town of Sankagiri spreads out—its narrow streets, its temple towers, its million lives going about their daily business.
As you stand on the summit, remember that you are standing on ground where Vijayanagara emperors planned their campaigns, where Tipu Sultan’s soldiers tested their rockets, where Dheeran Chinnamalai met his end, and where British officers watched for signs of rebellion.
The fourteen walls no longer repel invaders. The granaries are empty. The death well is silent. But the fort still stands—a monument to 600 years of Kongu history, and a reminder that some things are worth building wall after wall to protect.
A Deep Stride Through the Ten Gates of Sankagiri Fort – Seeking a visual companion to understand the complex military architecture of Sankagiri? This thorough exploration by Tamil Navigation takes you through the fort’s formidable gateway structures. Watch to examine the structural details of the Puli Mugam Vaasal (Tiger Face Gate), the historic stone inscriptions, and the hidden colonial storehouses where gunpowders were preserved deep within the rock face.
A 4K Tour of the Impenetrable Sankagiri Fort – Looking to understand the massive scale of Sankagiri Fort? This beautifully shot 4K feature by Wanderlust explores the sprawling 13-square-kilometer complex perched 700 feet above Salem district. The video covers its multi-dynastic architectural heritage, its intricate network of 14 defensive concentric walls, and its historic role as the execution site of freedom fighter Dheeran Chinnamalai in 1805.
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