| Mesterfjellet ungdomsskole | Mesterfjellet ungdomsskole | Norway, Larvik, Kristian Fredriks vei 3 | 2007-02-08 | -- | 2007 | 1 | |
| Manoir du Haut Busson | Manoir du Haut Busson | France, Évron, Manoir du Haut Busson | 2018-08-06 | -- | 2018 | 1 | |
| Maaspoort | Maaspoort | Netherlands, Venlo, Oude Markt 30 | 2009-10-28 | -- | 2009–2013 | 2 | |
| Museum of Contemporary Art, The | The Museum of Contemporary Art | United States of America, Chicago, 220 East Chicago Avenue | 2005-11-30 | 2009-02-15 | 2005–2009 | 2 | |
| Moelv kulturhus | Moelv kulturhus | Norway, Moelv, Skolevn. 11 | 2015-10-21 | 2015-10-21 | 2015 | 1 | |
| Maison de la Culture de Loire-Atlantique | Maison de la Culture de Loire-Atlantique | France, Nantes | 1995-10-05 | 1995-10-25 | 1995 | 1 | |
| Muhsin Ertugrul Sahnesi | Muhsin Ertugrul Sahnesi | Turkey, Istanbul, Harbiye Mh., Darülbedayi Cd. No:3 | 1998-05-30 | 2023-04-19 | 1998–2023 | 4 | |
| Massachusetts Institute of Technology (MIT) | Massachusetts Institute of Technology (MIT) | United States of America, Cambridge, 77 Massachusetts Ave | 1964-01-24 | -- | 1964 | 1 | |
| Midsund Ungdomsskole | Midsund Ungdomsskole | Norway, Midsund | 1990-02-28 | -- | 1990 | 1 | |
| Martha R. Tatum Theatre | Martha R. Tatum Theatre | United States of America, Hattiesburg, Theatre & Dance Building, University of Southern Mississippi | 2006-03-16 | 2006-03-26 | 2006 | 1 | |
| Motala | Motala | Sweden, Motala | 1992-10- | -- | 1992 | 1 | |
| Madlenianum Opera & Theatre | Madlenianum Opera & Theatre | Serbia, Belgrade, Glavna 32 | 2011-12-10 | -- | 2011 | 1 | |
| Møre Folkehøgskole | Møre Folkehøgskole | Norway, Ørsta, Kyrkjegata 48 | 1969-09-08 | -- | 1969 | 2 | |
| Melbourne Civic Theatre | Melbourne Civic Theatre | United States of America, Melbourne, 817 E Strawbridge Ave. | 2019-05-24 | 2019-06-30 | 2019 | 1 | |
| Moskovskij teatr imeni Leninskogo komsomola | Moskovskij teatr imeni Leninskogo komsomola | Russia, Moscow, ул. М. Дмитровка, 6 | 1939-04-20 | -- | 1939–2011 | 2 | |
| Mexico City | Mexico City | Mexico, Mexico City | -- | -- | | | |
| Master Institute Theatre | Master Institute Theatre | United States of America, New York | 1947-04-26 | 1947-05-02 | 1947 | 1 | |
| Montevideo | Montevideo | Uruguay, Montevideo | 1897-08- | -- | 1897–1974 | 3 | |
| Maison de la Culture d’Amiens, Grand Théâtre | Maison de la Culture d’Amiens, Grand Théâtre | France, Amiens, 2 Place Léon Gontier | 2009-06-10 | 2014-02-20 | 2009–2014 | 3 | |
| Mosjøen Kulturhus | Mosjøen Kulturhus | Norway, Mosjøen, Smågan 2 | 2009-04-28 | -- | 2009–2018 | 3 | |
| Málaga | Málaga | Spain, Málaga | 1975-08-28 | -- | 1975 | 1 | |
| Modena | Modena | Italy, Modena | 1900-11-08 | -- | 1900 | 1 | |
| Manhattan Opera House | Manhattan Opera House | United States of America, New York, 311 West 34th St | 1920-09-06 | -- | 1920 | 1 | |
| Myar Opera House | Myar Opera House | United States of America, El Paso | 1903-12-10 | 1903-12-10 | 1903 | 1 | |
| M. Lermontov State Academic Russian Drama Theather | Russkiy Respublikanskiy Dramaticheskiy Teatr Im. M.yu. Lermontova (M. Lermontov State Academic Russian Drama Theather) | Russia, Abakan, Republic of Khakassia, Ulitsa Shchetinkina 12 | 2023-05-26 | 2023-05-27 | 2023 | 1 | |
| Moscow Academic Mayakovsky Theatre | Moscow Academic Mayakovsky Theatre | Russia, Moscow, Bolshaya Nikitskaya Street, 19/13 | 2013-04-27 | -- | 2013 | 1 | |
| Mystery Brewery | Mystery Brewery | United States of America, Hillsborough, 437 Dimmock's Mill Rd | 2018-01-18 | 2018-02-03 | 2018 | 1 | |
| Maltings | Maltings | England, Berwick-upon-Tweed, Eastern Ln | 2011-06-16 | -- | 2011 | 1 | |
| Maddermarket Theatre | Maddermarket Theatre | England, Norwich, Norfolk, St Johns Alley | 1925-10-26 | 2002-02-02 | 1925–2002 | 21 | |
| Miller Centre, The | The Miller Centre | England, Caterham, Surrey, 30 Godstone Road | 2007-07-05 | 2007-08-03 | 2007 | 1 | |
| Markgräfliches Opernhaus Bayreuth | Markgräfliches Opernhaus Bayreuth | Germany, Bayreuth, Opernstraße 14 | 1922-09-23 | -- | 1922–1972 | 2 | |
| Meteleu(Scutelnici) | Meteleu (Scutelnici) | Romania, Meteleu(Scutelnici) | -- | -- | | | |
| Meadow Brook Theatre | Meadow Brook Theatre | United States of America, Rochester, 207 Wilson Blvd | 1967-11-10 | -- | 1967 | 1 | |
| Makedonski, Naroden, Teatar | Makedonski Naroden Teatar (Macedonian National Theatre) | Macedonia, Skopje, Iljo Vojvoda, Skopje 1000, Macedonia | 1922-03- | 1934-12- | 1922–2022 | 12 | |
| Merlin Theatre | Merlin Theatre | England, Frome, Bath Rd | 1993-10-21 | 2014-11-07 | 1993–2014 | 2 | |
| Maryland Theatre | Maryland Theatre | United States of America, Baltimore | 1903-10-21 | 1903-10-21 | 1903 | 1 | |
| Molde | Molde | Norway, Molde | 1966-04-26 | 1971-10-29 | 1966–2005 | 7 | |
| Musikkteatret, Vestbanen | Musikkteatret, Vestbanen | Norway, Oslo, Enga 3 | 1993-04-14 | 1994-03-13 | 1993–1994 | 2 | |
| Maison de la Culture de Bourges | Maison de la Culture de Bourges | France, Bourges, Place André Malraux | 1997-05-21 | 2014-12-04 | 1997–2014 | 3 | |
| Møllesalen | Møllesalen | Norway, Strusshamn | 2005-09-03 | -- | 2005 | 1 | |
| Marikollen ungd.skole | Marikollen ungd.skole | Norway, Fjerdingby, Rælingen | 2001-11-06 | -- | 2001 | 1 | |
| Mélo d'Amélie | Mélo d'Amélie | France, Paris, 4 Rue Marie Stuart | -- | -- | | | |
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