The Church of the Savior on Spilled Blood (Храм Спаса на Крови) is one of the main Russian Orthodox churches of St. Petersburg, Russia. It is also variously called the Church on Spilt Blood and the Cathedral of the Resurrection of Christ (Собор Воскресения Христова), its official name. The name refers to the blood of the assassinated Alexander II of Russia, who was mortally wounded on that site on March 13, 1881 (Julian date: March 1).

     Сonstruction began in 1883 under Alexander III, as a memorial to his father, Alexander II. Work progressed slowly and was finally completed during the reign of Nicholas II in 1907. Funding was provided by the Imperial family with the support of many private donors.

     The Church is prominently situated along the Griboedov Canal. The embankment at that point runs along either side of a canal. As the tsar's carriage passed along the embankment, a grenade thrown by an anarchist conspirator exploded. The tsar, shaken but unhurt, got out of the carriage and started to remonstrate with the presumed culprit. Another conspirator took the chance to explode another bomb, killing himself and mortally wounding the tsar. The tsar, bleeding heavily, was taken back to the Winter Palace where he died a few hours later.

     It was decided that the section of the street where the assassination took place was to be enclosed within the walls of a church. That section of the embankment was therefore extended out into the canal to allow the shrine to fit comfortably within the building and to provide space on the exterior wall for a memorial marking the spot where the assassination took place.
 
      The Church contains over 7500 square metres of mosaics -- according to its restorers, more than any other church in the world. This record may be surpassed by the Cathedral Basilica of St. Louis, which houses 7700 square meters of mosaics.

     In the aftermath of the Russian Revolution, the church was ransacked and looted, badly damaging its interior. The Soviet government closed the church in the early 1930s. During the Second World War when many people were starving due to the Siege of Leningrad by hostile Nazi German military forces, it was used as a warehouse for vegetables, leading to the sardonic name of Savior on Potatoes. It suffered significant damage. After the war, it was used as a warehouse for a nearby opera theatre.
 
     In July 1970, management of the Church passed to Saint Isaac's Cathedral (then used as a highly profitable museum) and proceeds from the Cathedral were funneled back into restoring the Church. It was reopened in August 1997, after 27 years of restoration, but has not been reconsecrated and does not function as a full-time place of worship. Right now, it is a Museum of Mosaic. Even before the Revolution it never functioned as a public place of worship; having been dedicated exclusively to the memory of the assassinated tsar, the only services served in it were panikhidas (memorial services). The Church is now one of the main tourist attractions in St. Petersburg.