dome of isakievsky cathedral on blue sky background framed by green trees. summer, outdoors

architecture travel russia isakievsky famous tourism christianity cathedral city church sobor sky saintpetersburg saint russian religion place palace isakievskiy petersburg isaakievskiy column isaakievsky dome isakievskij traditional tourist spirituality culture destinations construction christian outside destination people sculpture dark house monument landmark colonnade building isaakievskij square buildings entablement spb trees saintisaak blue background framed green trees summer outdoors copy space saint-petersburg russia education concept