I feel most people know about the various cities that were obliterated such as Warsaw, Dresden, and Tokyo to some extent, but what are some buildings or monuments of great historical value that were lost? Buildings that people would have gone to see, or painted, or would have been widely recognized prior to 1939, but were demolished either by artillery, bombardment, fire etc. by 1945? Feel free to exclude Monte Cassino, as its one of the more well-known losses.