Which fort was built by Mughal Emperor Zaheer-ud-Din Babur?

The region was taken over by Mughal Emperor Zahir-ud-Din Babur, roughly around 1526. He recognized the importance of the Bala Hissar Fort, which was situated at Peshawar. According to him, it was actually known as the Bagram Fort, as described by the emperor himself in his memoirs. Although the fort has a history dating prior to the reign of this emperor, it was still understood by him to be of significant importance. This fort has served, over time, as the royal abode of the rulers, along with its importance for military purposes.