These cities are needy in the way of wonders
Copenhagen - Amalienborg Palace -
http://en.wikipedia.org/wiki/Amalienborg
Lisbon - Mosteiro dos Jeronimos -
http://en.wikipedia.org/wiki/Mosteiro_dos_jeronimos
Vienna - Hofburg Palace -
http://en.wikipedia.org/wiki/Hofburg_Palace
Vienna - The Burgtheater -
http://en.wikipedia.org/wiki/Burgtheater
I've explained Amalienborg and the Monastery before, just give the consensus on weather or not people want it.
The Hofburg was the residence for most of the Habsburg monarchs of the Austrian Empire, built a little late, but Vienna is a little desperate.
We were looking for a way to represent Austrian cultural/musical works: Mozart, opera, etc. The Burgtheater was the most important theater and Opera House in Austria and three of Mozart's Opera's premiered there, including the Marriage of Figaro.