Rainy Day at St. Isaac's Cathedral" is a stunning watercolor painting that captures the grandeur of St. Isaac's Cathedral in the heart of St. Petersburg, Russia. The painting features the iconic cathedral in all its glory, with its golden dome and intricate architecture standing out amidst the dreary weather. The streets surrounding the cathedral are lined with tall trees, adding a touch of greenery to the scene. Cars can be seen driving through the streets, adding a sense of movement and life to the painting. The overall effect is one of a serene and contemplative mood, with the rain adding a sense of mystery and intrigue. It's a perfect painting for those who love architecture and have an interest in the history of St. Petersburg.