When the fort vicinity got overpopulated new constructions were built outside the fort walls shaping the size of hyderabad city, water problems soon caught them up forcing others to build farm houses with their own private water tanks and wells solving water shortage on the outskirts of hyderabad during the reign of Ibrahim . He employed thousands of men to locate diamond mines in his territory successfully from where the famous Koh-i-noor was found later which was gifted to Shah e jahan by traitor commander Mir who shifted to delhi . Delhi was invaded by nadir shah of iran in 1739 who grabbed both kohenoor and the throne of deli-takht -e -taus