The Druze faith is one of the major religious groups in the Levant, with between 800,000 and a million adherents. They are found primarily in Syria, Lebanon and Israel, with small communities in Jordan. The oldest and most densely-populated Druze communities exist in Mount Lebanon and in the south of Syria around Jabal al-Druze (literally the Mountain of the Druzes). The Druze's social customs differ markedly from those of Muslims or Christians, and they are known to form close-knit, cohesive communities which do not fully allow non-Druze in, though they themselves integrate fully in their adopted homelands.