The barbarian Islamic marauders camped in Hampi for about SIX MONTHS, to destroy it. Ever wonder why, the only temple left intact is the Virupaksha Vittala Temple?
BTW, Aurangazeb invited "architects" from Iran to plan the destruction of Mathura and Varanasi temples, to be able to re-use most of the artefacts for the ensuing mosques that were built on top of the ruins.