Udayagiri Fort: Travancore Military Heritage Summary
The Cannon Foundry of Travancore: Marthanda Varma to Captain De Lannoy
Spanning an expansive **90 acres** in Puliyoorkurichi near Padmanabhapuram in Kanyakumari district, Tamil Nadu, **Udayagiri Fort (உதயகிரி கோட்டை)** was the formidable military headquarters and royal arsenal of the **Kingdom of Travancore**. Originally established as a mud redoubt in the 17th century by the Venad kings, the fortress was completely rebuilt in massive dressed granite between **1741 and 1744 CE** by the legendary ruler **Anizham Thirunal Marthanda Varma** following his historic victory over the Dutch East India Company at the **Battle of Colachel (1741 CE)**.
King Marthanda Varma entrusted the modernization of the fortress to **Eustachius Benedictus De Lannoy**, a captured Dutch naval officer who pledged his loyalty to Travancore. Elevated to the rank of *Valiya Kappithan* (Senior Admiral / Commander-in-Chief), De Lannoy transformed Udayagiri Fort into a state-of-the-art European-style military complex, establishing specialized foundries that cast bronze cannons, forged iron cannonballs, and produced gunpowder for the Travancore army. De Lannoy lived inside the fortress until his death in 1777 CE and is buried inside its historic chapel.
Architectural Wonders: 18-Foot Ramparts, De Lannoy Chapel & Cannon Foundry
The fortress is constructed from **massive cut granite blocks and durable lime mortar**, laid out in an expansive irregular polygon covering 90 acres.
The 18-Foot Granite Perimeter Ramparts
The fortress is enclosed by massive stone walls rising over 18 feet high and 15 feet thick, reinforced with ten angular artillery bastions.
The Historic De Lannoy Chapel & Tomb
The ruined stone chapel inside the fort preserves the tomb of Captain Eustachius De Lannoy, inscribed with Latin and Tamil epitaphs honoring his military service.
The Royal Cannon Foundry & Gunpowder Magazine
The inner enclosure contains the surviving stone foundations of specialized smelting furnaces, cannon testing ranges, and subterranean gunpowder vaults.
The Forest Biodiversity Park & Deer Enclosure
Today, the lush green interior of Udayagiri Fort has been developed into an ecological bio-park housing spotted deer, native trees, and herbal gardens.
Kanyakumari Foothills Ecology: Tropical Forest & Herbal Flora
The moist tropical climate around Udayagiri supports ancient banyan trees, teak, medicinal herbs, and provides a peaceful home for peacocks, hornbills, and butterflies.
The Royal Approach: Monumental Granite Gateways
Visitors enter Udayagiri Fort through a massive arched stone portal reinforced with heavy timber gates that once defended the royal arsenal from foreign artillery attacks.
Naval Warfare: The Historic Battle of Colachel
In July 1741, King Marthanda Varma's forces defeated the Dutch fleet at Colachel, marking the first time an Asian sovereign army decisively vanquished a European naval power in India.
Military Genius: De Lannoy's Transformation of Travancore Army
General De Lannoy trained thousands of Nair infantry in European firearms drill, flintlock musket tactics, and artillery coordination, creating one of the most disciplined armies in 18th-century Asia.
Hydraulic Grandeur: Stone-Lined Mountain Reservoirs
Engineers excavated large stone-lined freshwater tanks inside the fort enclosure, supplied by rainwater runoff from surrounding hills to sustain foundry artisans and soldiers.
Sovereign Defense: The Padmanabhapuram Defense Ring
Udayagiri Fort served as the primary military shield for the nearby wooden royal palace at Padmanabhapuram, guarding the strategic pass between Kerala and Tamil Nadu.
Sovereign Heritage: The Living Memory of the Valiya Kappithan
Local communities and Christian congregations in Kanyakumari hold deep reverence for Captain De Lannoy, visiting his tomb to pay homage to his integrity and military loyalty.
Metallurgical Grandeur: Bronze Cannon Casting at Udayagiri
The royal foundry at Udayagiri cast colossal bronze artillery pieces, including the famous 16-foot cannon *Udayagiri Raja*, which fired 32-pound iron projectiles.
Epigraphical Grandeur: The Latin & Tamil Inscriptions
The Latin and Tamil inscriptions carved on De Lannoy's tombstone chronicle 37 years of loyal service to the Royal House of Travancore, celebrating his devotion to duty.
Ecological Splendor: The Flora & Fauna of Udayagiri Bio-Park
The dense forest canopy inside the 90-acre ramparts provides a tranquil nature retreat where spotted deer roam freely amidst towering teak and mahogany trees.
Sovereign Heritage: The Living Heritage Citadel of Kanyakumari
Today, Udayagiri Fort is maintained by the Tamil Nadu Forest Department and Tourism Corporation, welcoming history enthusiasts, researchers, and families from around the world.
Artillery Grandeur: The Subterranean Gunpowder Laboratories
De Lannoy engineered specialized subterranean chambers with thick stone blast walls where saltpetre and sulfur were refined into high-grade military black powder.
Practical Visitor Guide: Planning Your Visit to Udayagiri Fort
| Detail | Visitor Information |
|---|---|
| Location | Puliyoorkurichi, Thuckalay, Kanyakumari District, TN – 629175 |
| Nearest Major City | Thuckalay – 2 km / Nagercoil – 14 km / Kanyakumari – 32 km / Thiruvananthapuram – 52 km |
| Nearest Railway Station | Eraniel Railway Station (ERL) – 6 km / Nagercoil Junction (NCJ) – 15 km |
| Nearest Airport | Trivandrum International Airport (TRV) – 55 km |
| Entry Fee & Timings | Entry: ₹20 (Adults), ₹10 (Children) | Open daily from 9:00 AM to 5:30 PM |
| Best Time to Visit | October to March (Pleasant tropical weather; comfortable conditions for walking through the 90-acre wooded park) |
How to Reach Udayagiri Fort
Udayagiri Fort is situated along **National Highway 66 (Kanyakumari-Trivandrum Highway)** at Puliyoorkurichi, just 2 km from **Thuckalay** and 14 km from **Nagercoil**. Regular TNSTC and KSRTC buses between Trivandrum and Nagercoil stop right at the fort entrance.
Naval History: The Legacy of the 1741 Battle of Colachel
The defeat of the Dutch East India Company at Colachel in July 1741 led to the recruitment of Captain Eustachius De Lannoy, who modernized Udayagiri Fort into Travancore's supreme artillery bastion and weapons arsenal.
Industrial Grandeur: The 18th-Century Travancore Cannon Foundry
Inside the 90-acre fortress enclosure, De Lannoy established high-temperature smelting furnaces where skilled local metallurgists cast colossal bronze artillery pieces and forged thousands of iron cannonballs.
Historical Grandeur: The Tomb of the Valiya Kappithan
The historic stone chapel preserves the tomb of Captain De Lannoy, inscribed with Latin and Tamil epitaphs commemorating his 37 years of dedicated military service as Commander-in-Chief of the Travancore Army.
Hydraulic Grandeur: Subterranean Stone Reservoirs & Bio-Park
Engineers excavated large stone-lined water ponds supplied by natural hill runoff, supporting the garrison and nurturing the lush forest canopy that today houses spotted deer and native wildlife.
Sovereign Heritage: The 90-Acre Granite Fortress of Kanyakumari
The massive 18-foot granite ramparts, historical artillery foundry, and peaceful forest bio-park make Udayagiri Fort one of Tamil Nadu's most significant and captivating historical monuments.
Sovereign Defense: The 18-Foot Dressed Granite Battlements
The colossal 18-foot dressed granite curtain walls, ten angular artillery bastions, and subterranean gunpowder magazines of Udayagiri Fort formed an unassailable military stronghold that guarded the royal treasures and borders of Travancore.
Forest Grandeur: The Serene Canopy of Udayagiri Bio-Park
Surrounded by the forested hills of Kanyakumari, the expansive 90-acre wooded interior of Udayagiri Fort offers a tranquil walk through centuries of royal military history, spotted deer sanctuaries, and towering tropical trees.
Military Logistics: The Nair Brigade Barracks
The 90-acre enclosure of Udayagiri Fort housed barracks, parade grounds, and archery ranges where thousands of Nair Brigade soldiers underwent modern European infantry training under General De Lannoy.
Royal Heritage: The Military Shield of Padmanabhapuram
Located just two kilometers from the historic wooden palace of Padmanabhapuram, Udayagiri Fort functioned as the fortified royal armory and military defense headquarters of the Travancore monarchy.
Metallurgical Splendor: Historical Cannon Casting Furnaces
The specialized reverberatory furnaces of Udayagiri allowed Travancore foundry masters to melt high-grade copper and tin alloys, casting long-range bronze field pieces that defended the southern coastline.
Frequently Asked Questions about Udayagiri Fort
Who built Udayagiri Fort and when?
Udayagiri Fort was reconstructed in massive granite between 1741 and 1744 CE by King Marthanda Varma of Travancore and Dutch Commander Captain Eustachius De Lannoy.
Who was Captain Eustachius De Lannoy?
Captain De Lannoy was a Dutch naval officer captured at the Battle of Colachel in 1741 who became the Commander-in-Chief (*Valiya Kappithan*) of the Travancore Army and modernized its artillery.
Where is Captain De Lannoy buried?
Captain De Lannoy is buried inside the historic stone chapel located within Udayagiri Fort, alongside his wife and son.
What is inside Udayagiri Fort today?
Today, the 90-acre fort complex houses a lush biodiversity park, a deer enclosure, ancient granite ramparts, and the tomb of Captain De Lannoy.
The Battle of Colachel (1741) & The Travancore Royal Foundry
Spanning 90 acres around an isolated 260-foot granite hillock, **Udayagiri Fort (De Lannoy's Fort)** is a monument to a remarkable East-West military alliance. Following the historic victory of the Kingdom of Travancore over the Dutch East India Company at the **Battle of Colachel (1741)**—the first time an Asian army defeated a European colonial power—King **Marthanda Varma** enlisted captured Dutch naval officer **Eustachius De Lannoy** to modernize the state's military architecture.
Constructed with massive granite blocks, the fortress mounted over 100 heavy artillery guns and operated an advanced foundry producing indigenous firearms and gunpowder for the Travancore Royal Army.
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