The Cathedral of the Resurrection of Christ, also known as the Church of the Savior on Spilled Blood, is a prominent Russian Orthodox cathedral located in Saint Petersburg. It was built on the site where Emperor Alexander II was assassinated in 1881. The cathedral is renowned for its stunning architecture, featuring colorful onion domes and intricate mosaics that depict biblical scenes. Completed in 1907, the cathedral showcases a blend of Russian and Byzantine architectural styles. Its interior is adorned with over 7,500 square meters of mosaics, making it one of the largest mosaic collections in the world. The cathedral remains a significant cultural and historical landmark in Russia.