A golden sculpture of an angel on the pulpit in St. Nicholas Church in Prague. If I recall correctly, you are allowed to walk up in the mezzanine here, which is rare for these beautiful old churches. Doing so can let you see the beautiful wall and ceiling paintings even better.

http://www.stnicholas.cz/en/
https://en.wikipedia.org/wiki/St._Nicholas_Church_(Mal%C3%A1_Strana)