The Yazidi are a Kurdish ethnoreligious group with Indo-Iranian roots. They currently live primarily in the Nineveh Province of northern Iraq. Additional communities in Transcaucasia, Armenia, Turkey, and Syria have been in decline since the 1990s, their members having emigrated to Europe, especially to Germany. Their religion, Yazidism, is a branch of Yazdânism, and is seen as a highly syncretic complex of local Kurdish beliefs that contains Zoroastrian elements and Islamic Sufi doctrine introduced to the area by Sheikh Adi ibn Musafir in the 12th century. The Yazidi believe in God as creator of the world, which he placed under the care of seven holy beings or angels, the chief of whom is Melek Taus, the Peacock Angel.