Old St. Mary's Cathedral, Peoria
Catholic CathedralUnited States
Old St. Raphael's Cathedral, Dubuque
CathedralUnited States
Old Trinity Cathedral
CathedralRussia
Old Vyborg Cathedral
CathedralRussia
Olinda Cathedral
CathedralBrazil
Oliwa Cathedral
CathedralPoland
Olomouc Orthodox Church
CathedralCzech Republic
Omba Ney
Pilgrimage SiteBhutan
Omkareshwar Mandhata
Pilgrimage SiteIndia
Onzan-ji Temple
Pilgrimage SiteJapan
Onze-Lieve-Vrouwekathedraal
CathedralBelgium
Onze-Lieve-Vrouwekerk
Pilgrimage SiteBelgium
Onze-Lieve-Vrouw-ten-Traan
Pilgrimage SiteBelgium
Onze-Lieve-Vrouw ter Nood
Pilgrimage SiteNetherlands
Onze-Lieve-Vrouw-van-Lourdesbasiliek
Minor BasilicaBelgium
Oppido Mamertina cathedral
CathedralItaly
Orange Cathedral
CathedralFrance
Orani Church
Minor BasilicaPhilippines
oratoire Notre-Dame-de-France de Baillet-en-France
Marian ShrineFrance
Oratory of St. Joseph
Pilgrimage SiteCanada
Ordinariate Parish of St Bede the Venerable, Sydney
CathedralAustralia
Oria Cathedral
Minor BasilicaItaly
Original Schoenstatt Shrine
Marian ShrineGermany
Orihuela Cathedral
CathedralSpain