The holiness of this land was the ideological driving force behind the Crusaders' re-conquest from the Muslim rulers who controlled it since the Islamic conquests. Numerous pilgrims visited that land throughout history. Although the Zionism movement, the current State of Israel and the Israeli-Arab conflict are largely political, the dispute around the control of the Temple Mount in East Jerusalem is based on religious beliefs. Some have proposed the founding of a Federal Republic of the Holy Land as a one-state solution to the Israeli-Palestinian conflict.