technology to produce high-strength steel cannons. Having established a factory in St. Petersburg, he began producing lighter cannons, which were installed with breeched (the Krupp system), obsoleting the Perm cannon. Emperor Alexander II's decision saved it from destruction, instead preserving it as a historical relic. Today, the Perm Tsar Cannon is held on exhibition in the open museum of military equipment belonging to PAO "Motovilikha Plants". See also List of the largest cannon by caliber Tsar Bomba Tsar Bell References Notes Bibliography Klein, Mina. The Kremlin: Citadel of History. MacMillan Publishing Company (1973). M. E. Portnov: Carʹ-Puška i Carʹ-Kolokol, Moskovskij Rabočij, Moscow 1990, Tropkin, Alexander. The Moscow Kremlin: History of Russia's Unique Monument. Publishing House "Russkaya Zhizn" (1980). ASIN: B0010XM7BQ External links Tourist attractions in Moscow Artillery of Russia Siege artillery 890 mm artillery Moscow Kremlin Individual cannons