Ulugh Khan Jahan administered an area covering parts of present-day Khulna Division and Barisal Division in Bangladesh. Inscriptions in Bagerhat indicate that the mosque was built during the reign of Sultan Mahmud Shah between 1450 and 1459. Interestingly, Mahmud Shah was also responsible for transferring Bengal's capital from Pandua to Gauda. The reign of Mahmud Shah was marked by significant architectural development. In south Bengal, the mosque city of Bagerhat displays the simplistic 'Khan Jahan Style' of Bengali Islamic architecture. Ulugh Khan Jahan was responsible for establishing a planned township with roads, bridges, and water supply tanks (of which the "Ghoradighi" and "Dargadighi" still survive), cisterns, and several mosques and tombs. Ulugh Khan Jahan was a Sufi.