The Acropolis is a rocky hill that has always been a natural fort, inhabited and fortified since prehistoric times. It has known numerous wars, invasions and sieges in its turbulent history.
In the picture below, shell marks are clearly visible on columns of the western side of the Parthenon.
This post is the first of three about the destruction of the Parthenon during a war in 1687. Two more will follow, one with the events that led to the disaster and another detailing where the bomb that blew up the temple came from.