Qila Mubarak's construction began in 1764 by Baba Ala Singh, the founder of the Patiala state. Successive rulers added to the complex, resulting in its diverse architectural styles. It served as the royal residence and the center of power for the Patiala state. The fort witnessed significant historical events, including battles and treaties. During the British Raj, the Patiala state maintained its autonomy, and Qila Mubarak remained a symbol of its sovereignty. After India's independence, the fort was preserved as a historical monument, showcasing the legacy of the Patiala rulers. Today, it stands as a reminder of the region's glorious past and attracts tourists from all over the world.