According to the inscription at the upper part of the central mihrab, the foundation date seems to be the 4th day of Shawwal month in AH 817 (1414/1415 CE), which is 17 December.

[3] The pillars inside the mosque were taken from Hindu/Jain temples, and some still possess Hindu figures.

One pillar retains an inscription in Old Gujarati dated from 1252 from the reign of Vīsaladeva Vāghelā, identifying its origin from a temple to Uttareśvara in Mahiṁsaka (an unidentified locality in North Gujarat).

[2][4][5][6] The mosque was restored in 2011 by the Archaeological Survey of India at cost of ₹22 lakh (US$25,000).

[3] Media related to Ahmed Shah Mosque at Wikimedia Commons