spaso-preobrazhensky the solovetsky stavropegial monastery on bolshoy solovetsky island in the white sea. arkhangelsk region

15th ancient archipelago architecture arkhangelsk attraction big bolshoy cathedral century christianity day domes duomo famous grass heritage holy island lake landmark list male monastery oblast orthodoxy pilgrimage popular poselok preobrazhensky region religion russia saviour sea shore solovetskiy solovetsky solovki spasopreobrazhensky stavropegial tourism towers unesco walls water white world