This Castle District museum is definitely not for everyone. Inside a former barracks from the 1830s, it details Hungary's extensive military history, through a collection of weapons and other exhibits, and goes from the 16th century and the Turkish invasion through to the 1956 revolution and other 20th-century events. This part of the city saw an extensive amount of fighting during World War II, when the Germans and Russians met here for the Battle of Budapest. There's an array of military uniforms, documents, flags, models, weapons, maps, and photographs on display from that brutal conflict. For more on the Battle of Budapest, look for historian Krisztián Ungváry's book Battle for Budapest: 100 Days in World War II.