"A far more important discovery was made in 1860, in digging the foundation of the Magistrate and Collector's new court-house. The site selected for this building was an extensive mound overhanging the Agra road at the entrance to the civil station. It had always been regarded as merely the remains of a series of brick-kilns, and had been further protected against exploration by the fact that it was crowned by a small mosque. This was, for military reasons, blown down during the mutiny ; and afterwards, on clearing away the rubbish and excavating for the new foundations, it was found to have been erected, in accordance with the common usage of the Muhammadan conquerors, upon the ruins of a destroyed temple. A number of Buddhist statues, pillars, and basso-relievos, were disinterred ; and the inscriptions, as partially deciphered, would seem to indicate that the mound was occupied by several different monasteries..."
January 1, 1970
https://en.wikiquote.org/wiki/Conversion_of_non-Islamic_places_of_worship_into_mosques