Apollonia, known in the Early Islamic period as Arsuf and in the Crusader Kingdom of Jerusalem as Arsur, was an ancient city on the Mediterranean coast of today's Israel. Founded by the Phoenicians during the Persian period in the late sixth century BCE, it was inhabited continuously until the Crusader period, through the Hellenistic, Roman, and Byzantine periods, during the latter being renamed to Sozusa. It was situated on a sandy area ending towards the sea with a cliff.
It fell to the Muslims in 640, was fortified against Byzantine attacks and became known as Arsuf. In 1101 it was conquered by the Crusader Kingdom of Jerusalem, and was a strategically important stronghold in the Third Crusade, during which the Battle of Arsuf (1191) was fought nearby. The fortified city and the castle fell to the Mamluks in 1265, when both were completely destroyed.
The site of Apollonia–Arsuf was excavated in the 1990s and opened for visitors as Apollonia National Park in 2002. The above-ground remains before the excavations included the medieval city wall and moat, enclosing an area of about 90 dunam, a Crusader castle with a double-wall system with an area of about 4 dunam, a port with built jetties and a sheltered anchorage, protected by a sandstone reef.
Large amounts of pottery were recovered in the area surrounding the city, mostly of the Byzantine and early Islamic period, indicating that the city extended significantly beyond its old walls in the 7th century. A large Roman-era villa maritima was uncovered to the south of the site.
References:The Château de Foix dominates the town of Foix. An important tourist site, it is known as a centre of the Cathars. Built on an older 7th-century fortification, the castle is known from 987. In 1002, it was mentioned in the will of Roger I, Count of Carcassonne, who bequeathed the fortress to his youngest child, Bernard. In effect, the family ruling over the region were installed here which allowed them to control access to the upper Ariège valley and to keep surveillance from this strategic point over the lower land, protected behind impregnable walls.
In 1034, the castle became capital of the County of Foix and played a decisive role in medieval military history. During the two following centuries, the castle was home to Counts with shining personalities who became the soul of the Occitan resistance during the crusade against the Albigensians.