| Myklebust barne- og ungdomsskule | Myklebust barne- og ungdomsskule | Norway, Syvde | 2006-10-03 | -- | 2006 | 1 | |
| Mystic Seaport Museum | Mystic Seaport Museum | United States of America, Mystic, 75 Greenmanville Avenue | 2022-07-16 | -- | 2022 | 1 | |
| Millbank Theatre, The | The Millbank Theatre | Ireland, Rush, Co Dublin, Chapel Green | 2007-02-27 | -- | 2007 | 1 | |
| Moskovski teatr na Taganke | Moskovski teatr na Taganke | Russia, Moscow, Zemlyanoy Val, 76/21 | 2013-06-12 | -- | 2013 | 1 | |
| McKinleyville High School | McKinleyville High School | United States of America, McKinleyville, 1300 Murray Rd | 2005-12-05 | -- | 2005 | 1 | |
| Margaret Theatre | Margaret Theatre | United States of America, Anaconda | 1905-12-07 | 1905-12-07 | 1905 | 1 | |
| Maskavas Latviešu teātris | Maskavas Latviešu teātris | Russia, Moscow, Moscow | 1917-01-14 | -- | 1917 | 1 | |
| Moustier-Ventadour - Château de Ventadour | Moustier-Ventadour - Château de Ventadour | France | 2023-08-01 | 2023-07-21 | 2023 | 1 | |
| Main Stage Theatre | Main Stage Theatre | United States of America, Addison, 15650 Addison Rd | 2018-10-12 | 2018-11-04 | 2018 | 1 | |
| Maison des Arts et des Congrès | Maison des Arts et des Congrès | France, Niederbronn-Les-Bains, 42 Avenue Foch | 2000-01-15 | -- | 2000 | 1 | |
| Massachusetts Institute of Technology (MIT) | Massachusetts Institute of Technology (MIT) | United States of America, Cambridge, 77 Massachusetts Ave | 1964-01-24 | -- | 1964 | 1 | |
| Milan | Milan | Italy, Milan | 1899-12-12 | -- | 1899 | 1 | |
| Munroe Park Theater Guild, The | The Munroe Park Theater Guild | United States of America, Chicago, 2617 W. 105th Street | 2001-09-20 | 2001-09-22 | 2001 | 1 | |
| Maltings | Maltings | England, Berwick-upon-Tweed, Eastern Ln | 2011-06-16 | -- | 2011 | 1 | |
| Musée Maurice Denis | Musée Maurice Denis | France, Saint-Germain-en-Laye, 2 rue Maurice Denis | 2008-05-17 | 2008-05-17 | 2008 | 1 | |
| M/S Vesterålen | M/S Vesterålen | Norway, Tromsø | 1994-03-24 | -- | 1994 | 1 | |
| MeX Theater | MeX Theater | United States of America, Louisville, Kentucky Center for the Performing Arts, 501 W Main St | 2004-09-23 | 2004-10-02 | 2004 | 1 | |
| Merrimack Repertory Theatre | Merrimack Repertory Theatre | United States of America, Lowell, 50 E Merrimack St | 1991-03-20 | 1991-04-06 | 1991 | 1 | |
| Mansfield | Mansfield | United States of America, Mansfield | 1903-10-23 | 1903-10-23 | 1903 | 1 | |
| Mito geijutsukan ACM gekijō | Mito geijutsukan ACM gekijō (Art Tower Mito, ACM Theater) | Japan, Ibaraki, Japan, 〒310-0063 Ibaraki, Mito, 五軒町Gokencho, 1 Chome−6−8 水戸芸術館 1F | 2010-03-04 | -- | 2010 | 1 | |
| Masonic Temple | Masonic Temple | United States of America, Portland | 1910-02-28 | 1910-02-28 | 1910 | 1 | |
| Mellösagården | Mellösagården | Sweden, Mellösa, Lyckebovägen 3-1 | 2019-09-14 | 2019-09-14 | 2019 | 1 | |
| Městské divadlo | Městské divadlo | Czech Republic, Pardubice | 2008-01-19 | 2009-04-20 | 2008 | 1 | |
| Master Institute Theatre | Master Institute Theatre | United States of America, New York | 1947-04-26 | 1947-05-02 | 1947 | 1 | |
| Multnomah Hotel | Multnomah Hotel | United States of America, Portland | 1912-11-22 | 1912-11-22 | 1912 | 1 | |
| Montgomery Theatre | Montgomery Theatre | Canada, North Rustico, 57 Church Hill Avenue | 2011-09-01 | 2011-09-11 | 2011 | 1 | |
| Marjorie Lyons Playhouse | Marjorie Lyons Playhouse | United States of America | 2019-10-02 | 2019-10-06 | 2019 | 1 | |
| Městské divadlo Kolín | Městské divadlo Kolín | Czech Republic, Kolín | 1965-11-27 | -- | 1965 | 1 | |
| Musikefterskolen i Humble | Musikefterskolen i Humble | Denmark, Humble, Hovedgaden 21 | 2013-10-21 | -- | 2013 | 1 | |
| Maison de Culture Famenne-Ardenne, Marche | Maison de Culture Famenne-Ardenne, Marche | Belgium, Marche-en-Famenne, Chaussée de l’Ourthe, 74 | 1997-10-23 | -- | 1997 | 1 | |
| Merchant’s House Museum | Merchant’s House Museum | United States of America, New York, 29 E 4th St | 2011-07-07 | 2011-07-17 | 2011 | 1 | |
| Michailov Teatr | Michailov Teatr | Russia, St. Petersburg | 1897-09-24 | -- | 1897 | 1 | |
| MainLine Theatre | MainLine Theatre | Canada, Montréal, 3997 Boulevard Saint-Laurent | 2008-01-29 | 2008-02-16 | 2008 | 1 | |
| Minot University Black Box | Minot University Black Box | United States of America, Minot, 500 University Ave W | 2006-10-11 | 2006-10-12 | 2006 | 1 | |
| Männedorf ZH | Männedorf ZH | Switzerland | 2002-10-04 | -- | 2002 | 1 | |
| Maltings Arts Centre | Maltings Arts Centre | England, St Albans, Hertfordshire, The Maltings | 1993-09-24 | -- | 1993 | 1 | |
| Ménilmontant, Théâtre de | Théâtre de Ménilmontant | France, Paris, 15 Rue du Retrait | 2015-10-13 | 2015-10-25 | 2015 | 1 | |
| Mascheranova, Teatro | Teatro Mascheranova | Italy, Pontecagnano Faiano, Via Isonzo, 6-10 | 2018-02-17 | 2018-03-11 | 2018 | 1 | |
| Maison dans la Vallée | Maison dans la Vallée | France, Avon, 27-29 Rue du Vieux Ru | 2019-03-21 | -- | 2019 | 1 | |
| Mary Anderson Theatre | Mary Anderson Theatre | United States of America, Louisville | 1908-03-26 | 1908-03-30 | 1908 | 1 | |
| MIT Kresge Little Theatre | MIT Kresge Little Theatre | United States of America, Cambridge, 48 Massachusetts Ave (in MIT Kresge Auditorium) | 1998-05-07 | 1998-05-09 | 1998 | 1 | |
| Madhusudan Mancha | Madhusudan Mancha | India, Kolkata, Gariahat Rd, Dhakuria, Babu Bagan, Selimpur, Jodhpur Park | 2010-03-10 | -- | 2010 | 1 | |
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