1. Catedral de Santa Maria de la Sede, Spain – The multitude of gothic towers
2. Smolensk Cathedral, Russia – The most classical line in a Russian Church
3. Saint Basil’s Cathedral, Moscow, Russia – The typical orthodox cathedral sparkling with colors
4. Las Lajas Cathedral, Columbia – The daring path of faith in fortress style interpretation
5. Winchester Cathedral, Winchester, England – The divine simplicity
6. St. Peter Basilica, Italy – The Renaissance wonder
7. Basilica di San Marco, Italy – The fabulous castle style church
8. Alexander Nevsky Cathedral, Bulgaria – The parade of open arcades
9. Hagia Sophia (Holly Sophia), Turkey – Where Byzantine style met the challenge of Muslim transformation
10. Jubilee Church, Italy – The complexity of faith described in the most modern way possible
http://www.decodedstuff.com/christian-church-styles-in-europe/