The Great Gun of Moscow or Tsar's Cannon at Kremlin gardens. Even though the cannon was never used at wartime, it served as symbol of the Russian dynasty from the 16th century onwards.
[Great Gun of Moscow.]
CLARKE, Edward Daniel. Travels in various countries of Europe, Asia and Africa by Edward Daniel Clarke LL.D. Part the First. Russia Tatary and Turkey, London, Printed for T. Cadell and W. Davies, 1810.
State and military institutions - Diplomatic relations
The Gennadius Library - The American School of Classical Studies at Athens