St. Basil's Cathedral is a beautiful and majestic Russian Orthodox cathedral located in Moscow's Red Square. It was built by Ivan the Terrible during the 16th century and is dedicated to the Virgin Mary. It's a towering structure in the middle of the iconic Red Square, topped with colorful onion domes and a distinctive bell tower, creating an image of Moscow that has become iconic around the world. When coloring this beautiful structure, I would suggest using a range of colors to make it come to life. Bring out the bold reds and oranges of the domes and the brighter blues and yellows of the main building. These colors will contrast with the darker tones of the turrets and other details to really make the whole image stand out. Let your creativity run free, while still focusing on the realistic structure and colors to bring a realistic feel to the scene.