Mughal architecture, an amalgam of Islamic, Persian and Indian architecture, is the distinctive style developed by the Mughals in the 16th and 17th centuries in what is now India, Pakistan, and Bangladesh. Some of the first and most characteristic examples that remain of early Mughal architecture were built in the short reign of emperor Sher Shah Suri, who was not a Mughal; they include a mosque known as the Qila i Kuhna near Delhi, and the military architecture of the Old Fort in Delhi, the Lalbagh Fort in Bangladesh, and Rohtas Fort, near Jhelum in present-day Pakistan. His mausoleum, octagonal in plan and set upon a plinth in the middle of an artificial lake, is in Sasaram, and was completed by his son and successor Islam Shah Suri.