14 cathedrals visited by Harry Papas

Barcelona Cathedral

Cathedral of Saint Gregory Palamas

Cathedral of Santa Maria del Fiore

Cathedral of St. Michael and St. Gudula

Milan Cathedral

Munich Frauenkirche

Notre Dame de Paris

Pisa Cathedral

Saint Spyridon Church

Saint Stephen Cathedral

St Mark's Basilica

St Paul's Cathedral

St. Peter's Basilica

St. Salvator's Cathedral