[1][2] Constructed by Ibrahim Naib Barbak, a chieftain of Firoz Shah Tughlaq, it was built using the material owned by temples and palaces of the Rathore kings of Kannauj.

The fort was destroyed multiple times by rulers, including the Lodhis and the British Empire.

[3][1][2] The Kerar Kot fort once stood on the same site on the left (north) bank of the Gomti river.

It contained a mosque and a spacious and stylish set of baths (hammam) installed by Barbak, the brother of Tughlaq.

[4] A further outer gate was installed during the reign of the Mughal emperor Akbar under the patronage of the governor of Jaunpur, Min'im Khan, in the 16th century.

The spandrels or spaces between the arches of the outer gate were decorated with blue and yellow tiles.

Indian citizens and visitors from SAARC (Bhutan, Nepal, Bangladesh, Pakistan, Sri Lanka, Afghanistan, and the Maldives) and BIMSTEC Countries (Sri Lanka, Nepal, Bhutan, Bangladesh, Myanmar, and Thailand) at 25 INR per head and online 20 INR.