Oddfellows' Hall | Oddfellows' Hall | Australia, Wagga Wagga, Fitzmaurice Street | -- | -- | | | |
Opera House | Opera House | United States, Wyoming, Wyoming | -- | -- | | | |
Opera House | Opera House | United States, Telluride | -- | -- | | | |
Ornö | Ornö | Sweden, Ornö | -- | -- | | | |
Oituz | Oituz | Romania, Oituz | -- | -- | | | |
Odder | Odder | Denmark, Odder | -- | -- | | | |
Opole | Opole | Poland, Opole | -- | -- | | | |
Osimo | Osimo | Italy | -- | -- | | | |
Oppdal | Oppdal | Norway, Oppdal | -- | -- | | | |
Olivenza | Olivenza | Spain, Olivenza | -- | -- | | | |
Ornans | Ornans | France, Ornans | -- | -- | | | |
Oravice | Oravice | Slovak Republic, Oravice | -- | -- | | | |
Obârşia | Obârşia | Romania, Obârşia | -- | -- | | | |
Oranienburg | Oranienburg | Germany, Oranienburg | -- | -- | | | |
Ocna Sibiului | Ocna Sibiului | Romania, Ocna Sibiului | -- | -- | | | |
Oulu | Oulu | Finland, Oulu | -- | -- | | | |
Odessa | Одеса (Odessa) | Ukraine, Odessa | -- | -- | | | |
Ogra | Ogra | Romania, Ogra | -- | -- | | | |
Ostróg | Ostróg | Poland, Ostróg | -- | -- | | | |
Östersund | Östersund | Sweden, Östersund | 1879-- | -- | 1879 | 1 | |
Ordway Center for the Performing Arts (Main Hall) | Ordway Center for the Performing Arts (Main Hall) | United States, Saint Paul, 345 Washington St | 2005-10-18 | 2005-10-19 | 2005 | 1 | |
Osservatorio, Teatro | Teatro Osservatorio | Italy, Bari, Trento 12 | 2017-05-07 | -- | 2017 | 1 | |
Opera House | Opera House | United States, Bemidji | 1904-09-20 | 1904-09-20 | 1904 | 1 | |
Oslo Public Library | Oslo Public Library | Norway, Oslo, Arne Garborgs plass 4 | 1988-06-30 | -- | 1988 | 1 | |
Operetten Neues Theater, Central Theater | Operetten Neues Theater, Central Theater | Germany, Leipzig | 1910-08-23 | 1910-08-30 | 1910 | 1 | |
Orpheum | Orpheum | United States, El Paso | 1908-06-18 | 1908-06-18 | 1908 | 1 | |
Opernzelt | Opernzelt | Germany, Heidelberg, Emil-Maier-Straße 16 | 2011-04-29 | 2011-07-05 | 2011 | 1 | |
Odensbacken | Odensbacken | Sweden | 2002-09-12 | -- | 2002 | 1 | |
Orkanger gymnas | Orkanger gymnas | Norway, Orkanger | 1970-02-13 | -- | 1970 | 1 | |
Opera House | Opera House | United States, Santa Cruz | 1905-07-28 | 1905-07-28 | 1905 | 1 | |
Odd Duck Studio | Odd Duck Studio | United States, Seattle, 1214 10th Avenue | 2008-11-26 | 2008-12-20 | 2008 | 1 | |
Orăștie | Orăștie | Romania, Orăștie | 1911-02-16 | -- | 1911 | 1 | |
Ocean Hotell | Ocean Hotell | Norway, Horten, Jernbanegata 1 | 2006-02-02 | -- | 2006 | 1 | |
Opernhaus, Städtische Theater Karl-Marx-Stadt | Städtische Theater Karl-Marx-Stadt (Opernhaus) | Germany, Karl-Marx-Stadt (Chemnitz), Theaterplatz | 1956-04-29 | -- | 1956 | 1 | |
Omskiy Gosudarstvennyy Dramaticheskiy Pyatyy Teatr | Omskiy Gosudarstvennyy Dramaticheskiy Pyatyy Teatr | Russia, Omsk, ul. Krasnyy Put' 153 | 2005-10-01 | -- | 2005 | 1 | |
Ouagadougou, Carrefour Internationale de Théâtre de Ouagadougou | Carrefour Internationale de Théâtre de Ouagadougou | Burkina Faso, Bilbalogho, Ouagadougou, Burkina Faso | 2002-07-13 | -- | 2002 | 1 | |
Oslo Domkirke | Oslo Domkirke | Norway, Oslo, Karl Johans gate 11 | 2018-02-09 | 2018-02-10 | 2018 | 1 | |
Ontmoetingscentrum Aalbeke | Ontmoetingscentrum Aalbeke | Belgium, Aalbeke, Aalbekeplaats | 2001-03-12 | 2001-03-12 | 2001 | 1 | |
Odenkirchen | Odenkirchen | Germany, Odenkirchen | 1893-10-07 | -- | 1893 | 1 | |
Oxfordshire | Oxfordshire | England | 2020-05-08 | -- | 2020 | 1 | |
Odyssée, L' | L'Odyssée | France, Périgueux, Esplanade Robert Badinter | 2017-01-12 | 2017-01-13 | 2017 | 1 | |
Opéra Orchestre national Montpellier Occitanie | Opéra Orchestre national Montpellier Occitanie | France, Montpellier, 11 Boulevard Victor Hugo | 2018-01-12 | 2018-01-13 | 2018 | 1 | |
|