The site of Apollonia-Arsuf lies on the Mediterranean coast of Israel on a cliff overlooking a natural anchorage between Jaffa and Caesarea.
In 1101 Arsuf fell to a Crusader army led by Baldwin I of Jerusalem. The Crusaders, who called it Arsur, rebuilt the city's walls and created the Lordship of Arsur in the Kingdom of Jerusalem. In 1187 Arsuf was captured by the Muslims, but fell again to the Crusaders on September 7, 1191 after a battle between Richard I of England and Saladin.
In 1265 sultan Baibars, ruler of the Mamluks, captured Arsur, after 40 days of siege. The Mamluks razed the city walls and the fortress to their foundations, fearing a return of the Crusaders. The destruction was so complete that the site has not been resettled since.