| Cohen Family Studio Theatre, University of Cincinnati College | Cohen Family Studio Theatre, University of Cincinnati College | United States, Cincinnati, 290 CCM Blvd | 2006-04-27 | 2006-04-29 | 2006 | 1 | |
| Curtis High School | Curtis High School | United States, Staten Island, 105 Hamilton Ave | 2006-10-03 | -- | 2006 | 1 | |
| CaféTeatret | CaféTeatret | Denmark, Copenhagen, Skindergade 3 | 1988-05-24 | -- | 1988 | 1 | |
| Comprehensive School | Comprehensive School | Ireland, Glenties | 1980-03-21 | 1980-03-22 | 1980 | 1 | |
| Circle Theater Company | Circle Theater Company | United States, Manhattan, Broadway and 83rd street | 1973-04-15 | -- | 1973 | 1 | |
| Centro Cultural Bertolt Brecht (Sala Tito Junco) | Centro Cultural Bertolt Brecht (Sala Tito Junco) | Cuba, Havana | 2013-11-16 | -- | 2013 | 1 | |
| Château de Noirmoutier | Château de Noirmoutier | France, Noirmoutier-en-l'Île, Place d'Armes | 1972-07-17 | 1972-08-06 | 1972 | 1 | |
| Comète - Scène Nationale de Châlons-en-Champagne, La | La Comète - Scène Nationale de Châlons-en-Champagne | France, Châlons-en-Champagne, 5 Rue des Fripiers | 2012-02-16 | 2012-12-06 | 2012 | 1 | |
| Club Joplin | Club Joplin | United States, Webb City | 1908-10-20 | 1908-10-21 | 1908 | 1 | |
| Cable Hall | Cable Hall | United States, Atlanta | 1914-04-02 | 1914-04-02 | 1914 | 1 | |
| Complesso industriale ex-Minganti | Complesso industriale ex-Minganti | Italy, Bologna | 2001-10-18 | 2001-10-29 | 2001 | 1 | |
| Columbia Theatre | Columbia Theatre | United States, Washington | 1902-11-10 | -- | 1902 | 1 | |
| CC Den Blank | CC Den Blank (Cultuurcentrum Den Blank) | Belgium, Overijse, Begijnhof 11 | 2006-12-05 | -- | 2006 | 1 | |
| Cuxhaven | Cuxhaven | Germany, Cuxhaven | 2011-04-09 | -- | 2011 | 1 | |
| Centre Dramatique National | Centre Dramatique National | France, Orléans, Boulevard Pierre Segelle | 1997-02- | 1997-01-19 | 1997 | 1 | |
| Cinema Teatro Odeon | Cinema Teatro Odeon | Italy, Roseto degli Abruzzi Abruzzo, V. Nazionale SNC | 2008-02-22 | -- | 2008 | 1 | |
| Cultuurcentrum Brugge | Cultuurcentrum Brugge | Belgium, Brugge, Sint-Jakobsstraat 20 | 2007-12-18 | -- | 2007 | 1 | |
| Copley Theatre | Copley Theatre | United States, Boston, 225 Clarendon St | 1917-04-16 | -- | 1917 | 1 | |
| Centro Dramático de Ceuta / Instituto Siete Colinas | Centro Dramático de Ceuta / Instituto Siete Colinas | Spain, Ceuta, Barriada Odonnell | 2010-11-12 | 2010-11-20 | 2010 | 1 | |
| CASA 0101 Theater | CASA 0101 Theater | United States, Los Angeles, 2102 E 1st St | 2017-10-19 | 2017-11-12 | 2017 | 1 | |
| Cape Breton Regional Municipality | Cape Breton Regional Municipality | Canada, Nova Scotia | 2000-01-27 | 2000-01-29 | 2000 | 1 | |
| Carré, Scène nationale - Centre d'art contemporain, Le | Le Carré, Scène nationale - Centre d'art contemporain | France, Château-Gontier-sur-Mayenne, 4 bis Rue Horeau | 2012-12-04 | -- | 2012 | 1 | |
| Christ's Hospital School | Christ's Hospital School | England, Horsham, Christ's Hospital | 2018-10-08 | -- | 2018 | 1 | |
| Cohoes | Cohoes | United States, Cohoes | 1903-10-03 | 1903-10-03 | 1903 | 1 | |
| Chicago Norske Klubs Dramatiske Selskap | Chicago Norske Klubs Dramatiske Selskap | United States, Chicago | 1930-11-16 | 1930-11-23 | 1930 | 1 | |
| Collège Leclerc | Collège Leclerc | France, Schiltigheim, 9 avenue du 23 Novembre | 2020-09-18 | -- | 2020 | 1 | |
| City Stage Theatre | City Stage Theatre | United States, Kansas City, 30 W Pershing Rd | 2019-08-07 | 2019-08-25 | 2019 | 1 | |
| Cultural Center Comfandi | Cultural Center Comfandi | Colombia, Santiago de Cali, Valle del Cauca | 2008-10-25 | -- | 2008 | 1 | |
| Centro Cultural Matucana 100 | Centro Cultural Matucana 100 | Chile, Santiago, Avenida Matucana 100 | 2007-01-17 | 2007-03-24 | 2007 | 1 | |
| Connecticut | Connecticut | United States, Connecticut | 1998-- | 1998-- | 1998 | 1 | |
| Cass Theatre | Cass Theatre | United States, Cass City, 6464 Main Street | 1937-10-17 | -- | 1937 | 1 | |
| Charlestown Working Theater | Charlestown Working Theater | United States, Charlestown, 442 Bunker Hill St | 1988-03-18 | 1988-04-10 | 1988 | 1 | |
| Chicago Auditorium | Chicago Auditorium | United States, Chicago, 50 E Congress Pkwy | 1924-01-01 | 1924-01-10 | 1924 | 1 | |
| Casa de Cultura de Tobarra | Casa de Cultura de Tobarra | Spain, Tobarra, Albacete, Av. Juan Carlos I, 16 | 1993-01-02 | -- | 1993 | 1 | |
| CC Bilzen | CC Bilzen | Belgium, Bilzen | 1998-10-24 | -- | 1998 | 1 | |
| Caracas | Caracas | Venezuela, Caracas | 2014-- | -- | 2014 | 1 | |
| Canale 2 | Canale 2 | Italy, Altamura (BA), Via Giovanni Bovio 1, 70022 Altamura (BA) | 1970-05-20 | -- | 1970 | 1 | |
| Certamen de Teatro de Zarandona | Certamen de Teatro de Zarandona | Spain, Murcia | 2010-06-15 | -- | 2010 | 1 | |
| Champaign | Champaign | United States, Champaign | 1903-12-17 | 1903-12-17 | 1903 | 1 | |
| Chappelear Drama Center | Chappelear Drama Center | United States, Delaware, 45 Rowland Ave. | 2016-10-06 | 2016-10-09 | 2016 | 1 | |
| Courtyard Theatre, The | The Courtyard Theatre | England, London, Bowling Green Walk, 40 Pitfield St, | 2013-01-09 | 2013-01-20 | 2013 | 1 | |
| Centralen Voenen Club (Central Military Club) | Centralen Voenen Club (Central Military Club) | Bulgaria, Sofia, 7 Tzar Osvoboditel Blvd. | 2003-01-17 | -- | 2003 | 1 | |
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