Be sure to recycle
Outside of Moscow, reportedly on the location of one of the principal stavkas of the 1941 defense of the city from the German invasion, now stands the so-called Main Cathedral of Russian Armed Forces.
Built by popular subscription (with lots of help from the military and government) the immense Eastern Orthodox church is a living, breathing memory to the Russian (not Soviet) effort against Hitler in the Great Patriotic War. Opened over the weekend in a 3 hour-long ceremony attended by much brass to include the Minister of Defense, the facility is half WWII shrine/half church
Of interest, the giant steel doors to the cathedral include a fallen German eagle at the feet of very un-Soviet-like traditional Russian martial patron saints and is reportedly cast from metal that includes recycled German panzer treads, armor, and road wheels.
Going a step further, the steps and walkway into the door are made from reclaimed steel drawn from crates of German MP40s, Walther P-38s, and MG42s, a small part of the 3 million former Wehrmacht arms taken back to the Motherland in 1945.
If a part of you that is interested in collecting vintage WWII guns screamed out into the night, have no fear, as the Russians still have warehouses full of the stuff and they reportedly just melted down the low-end of their stock for the cathedral.
A video of part of the arms holdings still on hand in Vladimir, outside of Moscow, is below.