🏰 Koulas Fort: Home to the World’s Largest Cannon & 14th‑Century Heritage
Jagadamba Bhavani – 23 ft, 70 Tonnes | Kakatiya Fort | Kamareddy, Telangana
A fort that once boasted the deadliest cannon on Earth. Koulas Fort is a hidden gem in the Deccan, known primarily among historians and artillery enthusiasts. The Jagadamba Bhavani cannon (also called the Navgazi tope) is a marvel of 18th‑century metallurgy. It was cast in 1725 AD during the reign of Raja Gopal Singh Gaur (a Rajput king who received the fort from the Nizam). The cannon is made of iron and other alloys, with a caliber of 16 inches and capable of firing a 150‑kg explosive head. Its sound reportedly echoes like a bell when struck. The cannon was placed on the fort’s bastion using eight elephants and hundreds of men – a testament to its immense weight and engineering.
The fort itself has a three‑tier defence system, 52 bastions, two main gates bearing Kakatiya insignia, and two natural water tanks that never dry up. Inside, you’ll find a Shiva temple (Kasikund) with a fresh water spring (perennial), a dargah, a grain store, and temples dedicated to Rama, Hanuman, Balaji, and Ashtabuji Mata (Jagadamba Mata). The fort was later occupied by the Nizams and then the Rajput kings. The descendants of Rani Sonekunwar Bai still live in Koulas village. Despite neglect and poor infrastructure, Koulas Fort is a must‑visit for heritage and adventure travellers.
💥 The Jagadamba Bhavani Cannon – World’s Largest
The Jagadamba Bhavani cannon (also called Navgazi tope) is the crown jewel of Koulas Fort. Measuring 23 feet in length and weighing 70 tonnes, it is larger than the famous Jaivana cannon of Jaipur (20 ft, 50 tonnes) and the one on Bijapur Fort (15 ft, 55 tonnes). Its caliber is 16 inches, with an explosive head of 150 kg. The cannon was cast in 1725 AD under the Rajput king Raja Gopal Singh Gaur, who was granted the fort by the Nizam for his bravery in the battles of Balapur and Shakkar Kheda.
The cannon’s firing technique was elaborate: iron and stone balls were placed inside, followed by 150 kg of gunpowder. The primer was lit with a wick, and the firer would jump into a large water tank built next to the cannon to survive the blast’s shockwave, heat, and sound. It was tested and declared battle‑worthy – and the fort was never attacked in the last three centuries, thanks to the cannon’s fearsome reputation.
Col. Ajit Kumar Singh, a descendant of the royal family and a metallurgy expert, has verified the cannon’s unique metal composition. It sounds like a bell when struck – a rare property in cannons. The cannon is now a protected monument by the Archaeology Department.
🏛️ Fort Features – Three‑Tier Defence, 52 Bastions & Natural Tanks
- Three‑Tier Defence System: The outer, middle, and inner walls made it nearly impregnable.
- 52 Bastions: Small and large bastions for cannon placement and archers.
- Two Main Entrances: Both bear the insignia of the Kakatiya dynasty (the mythical Gandabherunda).
- Natural Water Tanks: Two perennial tanks inside the fort – rare in rocky terrain.
- Kasikund Temple: A Shiva temple with a perennial fresh water spring, modelled on the Kasi temple.
- Other Temples: Dedicated to Rama, Hanuman, Balaji (Venkateswara), and Ashtabuji Mata (Jagadamba Mata) – where Rajput kings prayed before battle.
- Dargah & Mosques: Two mosques inside the forest area, and a dargah within the fort.
- Grain Store (Grain Silo): Built with massive boulders, still intact.
⏰ Visitor Information
📍 Address & Access
Koulas Fort
Koulas Village, Jukkal Mandal,
Kamareddy District, Telangana – 503311
≈180 km from Hyderabad (≈4 hours drive)
≈100 km from Nizamabad
📞 Enquiries
Kamareddy District Tourism / Archaeology Department
Phone: +91-8452-222206 (representative)
No formal booking – free entry.
🌐 Official Info
🕐 Timings & Best Season
Timings: Sunrise to sunset (6:00 AM – 6:00 PM)
Best Season: October – February (pleasant weather)
Entry Fee: Free
Time needed: 2–3 hours
⚠️ Note
No shops, no toilets, no restaurants. Carry everything. The road to the fort is narrow but motorable. Wear sturdy shoes – the climb involves rocky paths.
🚗 How to Reach Koulas Fort
By Road (from Hyderabad): Take NH44 towards Nizamabad, then turn towards Pitlam – Nizamsagar – Jukkal – Koulas. Route: Hyderabad → Sangareddy → Andole → Nizamsagar → Pitlam → Koulas (≈180 km, 4 hours). The road is blacktopped but narrow in the last stretch. Private vehicle or taxi is essential – public transport is very limited. Alternatively, take a train to Nizamabad (≈100 km) and hire a taxi.
By Train: Nearest railway station is Nizamabad (≈100 km) or Kamareddy (≈70 km). From there, hire a taxi or jeep.
By Air: Rajiv Gandhi International Airport, Hyderabad (≈180 km).
🧭 Suggested 1‑Day Itinerary (Hyderabad → Nizamsagar → Koulas Fort)
- 6:00 AM: Depart from Hyderabad (carry packed breakfast, lunch, water).
- 9:30 AM: Arrive at Nizamsagar Dam (≈144 km) – explore the dam, gardens, and reservoir (1 hour).
- 10:30 AM – 11:30 AM: Drive to Koulas Fort (≈35 km, 1 hour).
- 11:30 AM – 1:30 PM: Explore Koulas Fort – see the Jagadamba Bhavani cannon, temples, dargah, bastions, and natural tanks.
- 1:30 PM – 2:30 PM: Picnic lunch near the fort (carry your own).
- 2:30 PM – 3:30 PM: Optional – visit Koulas Dam (≈20 km) for birdwatching (winter).
- 3:30 PM: Return to Hyderabad.
- 7:30 PM: Arrive back.
🏞️ Nearby Attractions
🏨 Where to Stay & Eat
Accommodation
- No accommodation at the fort.
- Nizamabad (≈100 km): Hotels like Hotel Ravi Teja, Haritha Hotel (TSTDC), budget lodges.
- Kamareddy (≈70 km): Basic lodges.
- Hyderabad (180 km): Day trip is feasible.
Food & Tips
- No shops or restaurants near the fort – carry all food and water.
- Pack a picnic – there are scenic spots near the fort.
- If you need a meal, stop at Nizamsagar town or at Pitlam on the highway.
📝 Travel Tips & Responsible Heritage Tourism
⭐ Pro tip: The Jagadamba Bhavani cannon is the highlight. Ask the local caretaker or villagers (some are descendants of the royal family) for the story of the cannon. If you have time, walk to the Ashtabuji Mata temple behind the fort – the view from there is spectacular. The fort is also a great spot for birdwatching (especially near the natural tanks). Unfortunately, infrastructure is minimal – come prepared for a raw, adventurous experience. The nearest proper meal is in Nizamsagar town or Pitlam, so pack accordingly.
👑 The Royal Connection – Descendants of Raja Gopal Singh
The descendants of Rani Sonekunwar Bai and Raja Gopal Singh Gaur still live in Koulas village. Col. Ajit Kumar Singh (retd.), a great‑grandson of Raja Padam Singh, has been instrumental in bringing the fort and its unique cannon to public attention. He has a doctorate in metallurgy and has verified the cannon’s exceptional composition. The family still performs traditional puja to the cannon, as has been done for over 250 years.
🙏 Conclusion – A Hidden Marvel of Military Engineering
Koulas Fort is not for the casual tourist – it is for those who seek raw history, offbeat adventure, and the thrill of discovering India’s largest cannon. The combination of Kakatiya heritage, Rajput valour, and the legendary Jagadamba Bhavani cannon makes it a unique destination. However, poor roads and lack of facilities mean you must be self‑sufficient. If you are prepared, Koulas Fort will reward you with a sense of discovery and awe.
❓ Frequently Asked Questions
Q: Is Koulas Fort open to visitors?
A: Yes, it is open daily from sunrise to sunset. No entry fee.
Q: Is the cannon really the largest in India?
A: Yes, at 23 ft and 70 tonnes, it surpasses the Jaivana cannon of Jaipur (20 ft, 50 tonnes).
Q: Are there any restaurants near the fort?
A: No. Carry your own food and water.
Q: Is the road accessible by car?
A: Yes, but the last stretch is narrow. A sedan can go; SUV is better.
Q: How far is Koulas from Nizamsagar Dam?
A: About 35 km (1 hour drive).
Q: Can I stay overnight at the fort?
A: No accommodation. Stay in Nizamabad or Kamareddy.
📚 References & More Information
- The Hindu – Jagadamba Bhavani: the deadliest cannon (2013)
- Wikipedia – Koulas Fort
- Kamareddy District Official Website
- Telangana Tourism – Kamareddy District
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