One of the several cannon and cannonball factories set up in 1786 by Monsieur Raymond, the then French General deputed in Nizam’s service, the Gun Foundry is the only one of its kind in Telangana. Called Tope-ka-Sancha by the locals, today it can be tracked in Abids in a narrow lane opposite the Mahboobia Girls’ High School. Cannons, or the topes, which bear inscriptions that reveal details of its manufacture, are displayed in Baagh-e-Aam, the Public Gardens.
Source: Wikipedia
“Cannons made in 1786 are still around”