Riwa Fort

Riwa Fort, locally known as Kala Qilla or Black Fort, is a historic coastal land battery situated in the Dharavi area of central Mumbai, India. Constructed in 1737 by John Horne, then Governor of Bombay, the structure was built using basalt stone and lime mortar. Its primary strategic purpose was to defend the city against the aggressive naval campaigns of the Maratha leader Kanhoji Angre. The fort occupies a significant location on the banks of the Mithi River, an area that was originally marshy land serving as a critical boundary dividing the territories controlled by the British East India Company and the Portuguese colonial forces.

Throughout its history, the fort changed hands multiple times, reflecting the turbulent colonial struggles of the region. After its initial construction by the British, it was eventually captured by the Maratha Kingdom before returning to British control and later passing to the Government of India following independence in 1947. Today, the site falls under the jurisdiction of the Maharashtra Directorate of Archaeology and Museums. Despite its historical importance as a guardian of erstwhile Bombay, the fort is currently in a dilapidated condition. It stands amidst the dense urban sprawl of the Dharavi slums and is not open to the general public, remaining a quiet remnant of the area's military past.

The architectural legacy of Riwa Fort serves as a tangible link to the 18th-century geopolitical landscape of Mumbai. While much of the original structure has deteriorated over the centuries, its existence highlights the strategic necessity of riverine defenses during the era of maritime warfare. The fort's proximity to the Mithi River underscores its original role in monitoring waterborne movements and protecting the island city from external threats. Although currently inaccessible and surrounded by modern development, it remains a categorized archaeological site within Maharashtra, preserving the memory of the conflicts between European powers and local Indian kingdoms.