Answer:
8: Amsterdam, Netherlands. ...
7: Sofia, Bulgaria. ...
6: Stockholm, Sweden. ...
5: Athens, Greece. ...
4: Brussels, Belgium. ...
3: Szczecin, Poland. Most densely populated 1km sq: 32,752 people. ...
2: Paris, France. Most densely populated 1km sq: 52,218 people. ...
1: Barcelona, Spain. Most densely populated 1km sq: 53,199 people
