christianity reached its golden age in the late fifth century under vachagan the pious (ruled 487–510 ad), who launched a campaign - influenced by byzantine priests - against idol worship in caucasian albania and discouraged persian zoroastrianism. after the muslim invasions of the 7th century the original christians have nearly disappeared from actual azerbaijan. the only remaining caucasian albanians are the udi people, who maintain the christian faith of their roman influenced ancestors. the last 7000 udi live mostly in the village of nij of the region of kabala and oguz (former vartashen), but a few can be found in the capital baku.