The best known monument in the city where I currently live is this relic of "socialist realism art" from when it was called Karl-Marx-Stadt (1953 to 1990). I have yet to meet anyone here in Chemnitz who calls themselves a Marxist, but I'm sure there are a handful to be found. There is also a brewery called Marx Staedtler (Marx City Brewery), but the beer is not as good as the three other big regional breweries.
The side of the building has a multi-story high plaque behind Marx that reads in many languages "Proletarians of all lands, Unite!"
Ironically, the city tax collection office is located on the ground floor of the building, almost right behind the bust of Marx.