Because of its 520-year Ottoman past, and the fact many of its inhabitants today are Muslims, Skopje has more mosques than churches. Religious communities often complain about the lack of infrastructure and new places of worship are often built. Skopje is the seat of many Macedonian religious organizations, such as the Macedonian Orthodox Church and the Islamic Religious Union of Macedonia. It has an Orthodox cathedral and seminary, several madrasahs, a Roman Catholic cathedral and a synagogue.