The Kurds are an ethnic Iranian group in the Middle East, mostly inhabiting a contiguous area spanning adjacent parts of modern-day Iran, Iraq, Syria, and Turkey, a geo-cultural region often referred to as 'Kurdistan'. The Kurds have ethnically diverse origins. They are culturally and linguistically closely related to the Iranian peoples and, as a result, are often themselves classified as an Iranian people. The Kurdish languages form a subgroup of the Northwestern Iranian languages. The Yazidis are a Kurdish religious community whose syncretic but ancient religion Yazidism is linked to Zoroastrianism and ancient Mesopotamian religions.They live primarily in the Nineveh Province of Iraq. Additional communities in Armenia, Georgia, and Syria have been in decline since the 1990s as a result of significant migration to Europe, especially to Germany. In Armenia, the Yazidis are recognized as a national group.