St Basil's Cathedral, Byzantine architecture, colorful onion domes, intricate stone carvings, ornate golden details, grandeur, symmetrical composition, vibrant turquoise, green, yellow, and red hues, Moscow, winter, snow-covered rooftops, frozen streets, old Russian charm, ornate iron fences, majestic entrance gates, grand staircase, stunning interior vaulted ceilings, intricate frescoes, warm candlelight, solemn atmosphere.