MiguelDeMadrid's 2013 Church Power Rankings

Don't quite call it a final four, but here are the rankings for my favorite churches in Europe thus far.
Because basically, I've visited a church in every city here.

1: St. Peter's Basilica (Vatican City)

2: Sistine Chapel (Vatican City)

3: Sagrada Familia (Barcelona, Spain)

4: Basilica Di Santa Maria (Rome, Italy)

5: St. Mary's Cathedral (Krakow, Poland)

6: Old and New Cathedrals (Salamanca, Spain) 

7: Basilica of Notre-Dame de Fourvière (Lyon, France)

8: Sevilla Cathedral (Sevilla, Spain)

9: St. Stevens Cathedral (Vienna, Austria)

10: Cathedral of Segovia (Segovia, Spain)