[ginko]

In fact at it's imperial height, Vienna had a higher population than today(2.1M then 1.9M now), living in significantly less space. The living conditions of the poorer part of the city were pretty grim. This is what got the Social Democrats to gain power in the first place.

[iguy]

This history also means there's a lot of pre-1914 city per capita today. The urban planning of that era has tended to result in more liveable neighborhoods today, compared to districts & cities built from scratch more recently.