Palestine's history of rule by many different empires is reflected in Palestinian cuisine, which has benefited from various cultural contributions and exchanges. Generally speaking, modern Syrian-Palestinian dishes have been influenced by the rule of three major Islamic groups: the Arabs, the Persian-influenced Arabs and the Turks. The Arabs who conquered Syria and Palestine had simple culinary traditions primarily based on the use of rice, lamb and yogurt, as well as dates. The already simple cuisine did not advance for centuries due to Islam's strict rules of parsimony and restraint, until the rise of the Abbasids, who established Baghdad as their capital. Baghdad was historically located on Persian soil and henceforth, Persian culture was integrated into Arab culture during the 9th–11th centuries and spread throughout central areas of the empire.