Kremlin Arsenal

A pretty big triangular building close to the edge of Moscow's Kremlin that faces the red square (the top of the building features a pole with a Russian flag that is very prominent on the red square). This building was traditionally the armoury of the fortress. However in the 20th centry it was converted to government offices and now features a museum where many of the past Czar family's treasures are shown to the public (albeit access is heavily regulated). Some of its exhibits include the "Shapka Monomacha" (Monomach's Hat) which is Russia's version of Europe's Golden Crown (it's made of some really small animal's leather, very fuzzy, and crowned with some of the world's biggest diamonds set in gold).