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Arsuf (Hebrew: אַרְסוּף , ארשוף , "Arshooph", "Arsoof" ; Arabic: أرْسُوف, "ʾArsūf"), also known as Arsur or Apollonia (Ancient Greek Απολλωνία), was an ancient city and fortress located in Israel, about 15 kilometres north of modern Tel Aviv, on a cliff above the Mediterranean Sea. The city site, Tel Arsuf, was intensively excavated from 1994.
In 2002 it became Apollonia National Park.
In 1995 a neighborhood by the name of Arsuf was established to the north of the ancient city.
The town was settled by Phoenicians in the 6th or 5th century BC, and named Reshef after Resheph, the Canaanite god of fertility and the underworld. It was then a part of the Persian Empire and governed from Sidon. Phoenicians of Reshef produced precious purple dye, derived from murex mollusks, which they exported to the Aegean.
Under Roman rule, the size of the town increased. It was an important settlement between Jaffa and Caesarea along Via Maris, the coastal road. In 113 AD, Apollonia was destroyed partially by an earthquake, but recovered quickly. The harbor was built, and trade with Italy and North Africa developed.
During the Byzantine period, the town extended to cover an area of 70 acres (280,000 m2). In the 5th and 6th century AD it was the second largest city in Sharon valley, after Caesarea, populated by Christian and Samaritans, having an elaborate church and a prosperous glass industry.
In 640 AD, the town was captured by Muslims, and the Semitic name Arsuf was restored as Arabic transliteration of Reshef. The town's area decreased to about 22 acres (89,000 m2) and, for the first time, it was surrounded by a fortified wall with buttresses, to resist the constant attacks of Byzantine fleets from the sea. Large marketplaces appeared, and pottery production developed. In 809 AD, following the death of Harun al-Rashid, the local Samaritan community was destroyed and their synagogue ruined.
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.
John of Ibelin, Lord of Beirut (1177—1236) became Lord of Arsuf in 1207 when he married Melisende of Arsuf (born c.1170). Their son John of Arsuf (c.1211—1258) inherited the title. The title then passed to John of Arsuf's eldest son Balian of Arsuf (1239—1277). He built new walls, the big fortress and new harbor (1241). From 1261, the city was ruled by the Knights Hospitaller.
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 was abandoned. In 1596, Ottoman tax registers recorded a village there with 22 families and 4 bachelors and later a village called al-Haram existed adjacent to the ruins until it was depopulated during the 1948 Arab-Israeli War.
- Apollonia National Park
- Gestes des Chiprois, Part III, p.117, ed. Gaston Raynaud, Genève, 1887: The year given by the chronicler known as the Templar of Tyre is 1265.
- Hütteroth, Wolf-Dieter; Abdulfattah, Kamal (1977), Historical Geography of Palestine, Transjordan and Southern Syria in the Late 16th Century, Erlanger Geographische Arbeiten, Sonderband 5. Erlangen, Germany: Vorstand der Fränkischen Geographischen Gesellschaft, p. 140
- Sharon, Moshe (1997), Corpus Inscriptionum Arabicarum Palaestinae, Vol. I, A, BRILL, ISBN 90-04-10833-5 (see p.114)
- Roll, Israel; Tal, Oren (1999), Apollonia-Arsuf : final report of the excavations, the Persian and Hellenistic periods, with appendices on the Chalcolithic and iron age II remains, Emery and Claire Yass Publications in Archaeology, ISBN 965-266-012-4
|Wikimedia Commons has media related to Apollonia, Israel.|
- Apollonia National Park - official site
-  The Official Apollonia-Arsuf Archaeological Project
- Archaeological exploration of Arsuf Israel Ministry of Foreign Affairs
- Apollonia National Park Gems of Israel
- Pictures of Apollonia-Arsuf Holy Land Pictures
-  Arsuf - A Community by the Sea