saint petersburg, russia, st. isaac's cathedral

architecture building cathedral christianity church city colonnade column construction cultural culture cupola destinations dome europe famous granite historic illumination isaac isaacs isaak isaakievskij isaakievskiy isaakievsky isakievskij isakievskiy isakievsky journey landmark leningrad lights montferrand night orthodox palace peter peterburg petersburg piter place religion russia russian saint sankt sculpture sobor statue tour town traditional travel trip