18 cathedrals visited by Todd Ryan

Alexander Nevsky Cathedral

Barcelona Cathedral

Cathedral of Santa Maria del Fiore

Cologne Cathedral

Helsinki Cathedral

Nice Cathedral

Notre Dame de Paris

Porto Cathedral

Rouen Cathedral

Saint-Peters Basilica

Saints Peter and Paul Cathedral

Salisbury Cathedral

Santa Iglesia Catedral Primada de Toledo

St Mark's Basilica

St Paul's Cathedral

St. Mary's Cathedral

St. Patrick's Cathedral

St. Peter's Basilica