Qila Mubarak, is a historical monument in the heart of the city of Bathinda in Punjab, India. It is recognized as monument of national importance and maintained by Archaeological Survey of India. It has been in existence from 1100-1200 AD in its current place and is the oldest surviving fort in India. It was here that Razia Sultan, the first woman to take charge of the Delhi throne was incarcerated on her defeat and dethroned.The bricks of the fort date back to the Kushana period when emperor Kanishka ruled over Northern India/Bactria. Raja Dab, along with emperor Kanishka, is believed to have built the fort.