Adherents of Oriental Orthodox Christianity in Azerbaijan are mainly ethnic Armenians. The Armenian Apostolic Church currently has no community outside the Nagorno-Karabakh Republic. Before the outbreak of the war, Armenians formed the largest Christian population in the country. Today, Armenian churches in Azerbaijan remain closed, because of the large outmigration of Armenians and fear of Azerbaijani attacks. During the First Nagorno-Karabakh War, despite the constitutional guarantees against religious discrimination, numerous acts of vandalism against the Armenian Apostolic Church were reported throughout Azerbaijan. At the height of the Baku pogrom in 1990, the Armenian Church of St. Gregory Illuminator was set on fire, but was restored in 2004 and is not used anymore.