Faizabad was the capital of the Nawabs, and during their rule they constructed several magnificent monuments. One of these was the Fort Calcutta, which was commissioned by Shuja-ud-Daula after he was defeated by the British in the war at Buxar in 1764.
The construction of the fort signified that even after losing the battle, he did not lose control over the area. According to history, the Nawab and his wife lived in the fort till their death. The walls of the fort are made of local clay. The architecture is distinctively Mughal in style.