The Church of the Savior on Spilled Blood (Russian: Церковь Спаса на Крови, Tserkovʹ Spasa na Krovi) is one of the main sights of St. Petersburg, Russia. It is also variously called the Church on Spilt Blood (Russian: Церковь на Крови, Tserkov’ na Krovi) and the Cathedral of the Resurrection of Christ (Russian: Собор Воскресения Христова, Sobor Voskreseniya Khristova), its official name.
This Church was built on the site where Tsar Alexander II was assassinated and was dedicated in his memory.
Kazan Cathedral or Kazanskiy Kafedralniy Sobor (Russian: Каза́нский кафедра́льный собо́р), also known as the Cathedral of Our Lady of Kazan, is a cathedral of the Russian Orthodox Church on the Nevsky Prospekt in St. Petersburg. It is dedicated to Our Lady of Kazan, probably the most venerated icon in Russia
The construction was started in 1801 and continued for ten years (supervised by Alexander Stroganov).