| | Ma Lin | | Master of Holy Blood | | Miller, Richard Edward |
| | Ma Yuan | | Master of Holy Kinship | | Miller, William Rickarby |
| | Ma Yuanyu | | Master of Hoogstraten | | Millet, Francisque |
| | MacDonald, J.E.H. | | Master of Housebook | | Millet, Jean-François  |
| | MacDonald-Wright, Stanton | | Master of Joseph Sequence | | Milton, Peter |
| | MacEwen, Walter | | Master of Langmatt Foundation | | Minderhout, Hendrik van |
| | Machuca, Pedro | | Master of Legend of Saint Catherine | | Mir, Joaquim |
| | Macke, August | | Master of Legend of Saint Lucy | | Miralles, Francisco |
| | MacMonnies, Frederick William | | Master of Legend of Saint Ursula | | Miró, Joan |
| | Macomber, Mary Lizzie | | Master of Legend of Saint Ursula (2) | | Mitchell, Alfred |
| | MacRae, Elmer Livingston | | Master of Lille Adoration | | Mitchell, Joan |
| | MacRae, Emma Fordyce | | Master of Lombard Fruit Bowl | | Modersohn-Becker, Paula |
| | Madrazo y Küntz, Federico de | | Master of Magdalen Legend | | Modigliani, Amedeo |
| | Maes, Nicolaes | | Master of Mountain Landscapes | | Moeller, Louis |
| | Maffei, Francesco | | Master of Orcagnesque Misericordia | | Moeyaert, Claes |
| | Magdalen Master | | Master of Osservanza | | Moholy-Nagy, László |
| | Maggiotto, Domenico | | Master of Saint Barbara Legend | | Moillon, Louise |
| | Magini, Carlo | | Master of Saint Bartholomew Altar | | Moitte, Jean-Guillaume |
| | Magnasco, Alessandro | | Master of Saint Giles | | Mola, Pier Francesco |
| | Magnasco, Stefano | | Master of Saint Veronica | | Molenaer, Jan Miense |
| | Magnelli, Alberto | | Master of Scandicci Lamentation | | Molenaer, Klaes |
| | Magritte, René | | Master of Small Landscapes | | Moll, Carl |
| | Maillol, Aristide | | Master of Straus Madonna | | Molyn, Pieter de |
| | Maineri, Francesco | | Master of Tiburtine Sibyl | | Mommers, Hendrick |
| | Maino, Juan Bautista | | Master of Urbino Coronation | | Momper, Frans de |
| | Major, Ernest Lee | | Master of View of Saint Gudule | | Momper, Josse de |
| | Majorelle, Jacques | | Master of Virgo inter Virgines | | Monaldi, Paolo |
| | Makovsky, Konstantin | | Master SB | | Mondrian, Piet |
| | Makovsky, Vladimir | | Master with Parrot | | Monet, Claude |
| | Maleas, Konstantinos | | Matham, Jacob | | Monnoyer, Jean Baptiste |
| | Malevich, Kazimir | | Matham, Theodor | | Monogrammist IS |
| | Mallet, Jean-Baptiste | | Mathews, Arthur | | Mřnsted, Peder |
| | Mallo, Maruja | | Matisse, Henri | | Montagna, Bartolomeo |
| | Malouel, Jean | | Matsuno Chikanobu | | Montenegro, Roberto |
| | Malton II, Thomas | | Matta, Roberto | | Montezin, Pierre-Eugene |
| | Malyavin, Filipp | | Matteis, Paolo | | Monticelli, Adolphe |
| | Man Ray | | Matteo di Giovanni | | Moor, Karel de |
| | Man, Cornelis de | | Matteson, Tompkins Harrison | | Moore, Albert Joseph |
| | Mander, Karel van | | Matulka, Jan | | Moore, Charles Herbert |
| | Mané-Katz | | Maufra, Maxime | | Moore, Henry |
| | Manet, Édouard | | Maulbertsch, Franz Anton | | Moore, Henry Spencer |
| | Manetti, Rutilio | | Maurer, Alfred | | Mor, Anthonis |
| | Manfredi, Bartolomeo | | Mauve, Anton | | Mora, Francis Luis |
| | Mangold, Sylvia Plimack | | Mazo, Juan Bautista Martinez del | | Morach, Otto |
| | Manguin, Henri | | Mazzoni, Sebastiano | | Morado, Jose Chavez |
| | Mankes, Jan | | McCloskey, William | | Morales, Armando |
| | Mansueti, Giovanni | | McCord, George | | Morales, Luis de |
| | Mantegna, Andrea | | McEntee, Jervis | | Moran, Edward |
| | Mantovano, Francesco | | McKewan, David Hall | | Moran, Peter |
| | Maratti, Carlo | | McMurtrie, William Birch | | Moran, Thomas |
| | Marc, Franz | | McTaggart, William | | Morandi, Giorgio |
| | Marcoussis, Louis | | Meckenem II, Israhel van | | Morazzone |
| | Marcovaldo, Coppo di | | Mehta, Tyeb | | Morbelli, Angelo |
| | Marden, Brice | | Mei Qing | | Moreau, Gustave |
| | Margolies, Samuel | | Meidner, Ludwig | | Moreau, Jean-Michel |
| | Marieschi, Michele Giovanni | | Meissonier, Jean Louis Ernest | | Moreau, Louis-Gabriel |
| | Marin, John | | Melchers, Gari | | Moreelse, Paulus |
| | Marinari, Onorio | | Meléndez, Luis | | Morel, Jan |
| | Marini, Marino | | Mellan, Claude | | Moret, Henri |
| | Mario dei Fiori | | Melone, Altobello | | Moretto da Brescia |
| | Maris, Jacob | | Meltsner, Paul | | Morgan, Frederick |
| | Maris, Matthijs | | Meltzer, Arthur | | Morisot, Berthe |
| | Maris, Willem | | Melville, Arthur | | Morland, George |
| | Marlow, William | | Melzi, Francesco | | Morland, Henry Robert |
| | Marquet, Albert Pierre | | Memling, Hans | | Morley, Malcolm |
| | Marrel, Jacob | | Menabuoi, Giusto de' | | Moroni, Giovanni Battista |
| | Marsh, Reginald | | Méndez, Leopoldo | | Morren, George |
| | Marshall, Benjamin | | Meneghelli, Enrico | | Morris, George |
| | Martin, Agnes | | Mengs, Anton Raphael | | Morrocco, Alberto |
| | Martin, Elias | | Menpes, Mortimer | | Morse, Samuel Finley Breese |
| | Martin, Henri | | Menzel, Adolf von | | Mortel, Jan |
| | Martin, Homer | | Mercier, Philip | | Moser, Kolo |
| | Martin, John | | Merian, Maria Sibylla | | Mostaert, Gillis |
| | Martinelli, Giovanni | | Mérida, Carlos | | Mostaert, Jan |
| | Martinez, Alfredo Ramos | | Merson, Luc Olivier | | Motherwell, Robert |
| | Martínez, Ricardo | | Meryon, Charles | | Moucheron, Frederik de |
| | Martínez-Cubells, Enrique | | Mesdag, Hendrik | | Moucheron, Isaac de |
| | Martini, Francesco di Giorgio | | Messina, Antonello da | | Moudarres, Fateh |
| | Martini, Simone | | Metcalf, Willard Leroy | | Mount, William Sidney |
| | Martino, Antonio | | Metsu, Gabriel | | Moustafa, Ahmed |
| | Maruyama Okyo | | Metsys, Quinten | | Mowbray, Henry Siddons |
| | Marxer, Alfred | | Metz, Conrad Martin | | Moyne de Morgues, Jacques le |
| | Masaccio | | Metzinger, Jean | | Muche, Georg |
| | Mascherino, Ottaviano | | Meulen, Adam Frans van der | | Mueller, Otto |
| | Mashkov, Il'ya | | Mexiac, Adolfo | | Muhrman, Henry |
| | Maso di Banco | | Meyer, Johann Georg | | Mulhaupt, Frederick |
| | Masolino | | Meyerowitz, William | | Mulier I, Pieter |
| | Masson, André | | Mi Youren | | Mulier II, Pieter |
| | Massys, Cornelis | | Michallon, Achille Etna | | Muller, Jan |
| | Massys, Jan | | Michau, Théobald | | Müller, Leopold Carl |
| | Mastenbroek, Johan Hendrik van | | Michel, Alfonso | | Müller, William James |
| | Master ES | | Michel, Georges | | Multscher, Hans |
| | Master Francke | | Michelangelo | | Munakata, Shiko |
| | Master FVB | | Michele di Matteo da Bologna | | Munch, Edvard |
| | Master IAM of Zwolle | | Michetti, Francesco Paolo | | Munkácsy, Mihály |
| | Master LCZ | | Miel, Jan | | Munnings, Alfred |
| | Master MZ | | Mielich, Hans | | Muńoz Vera, Guillermo |
| | Master of 1499 | | Mierevelt, Michiel Jansz van | | Münter, Gabriele |
| | Master of 1540s | | Mieris I, Frans van | | Munthe, Gerhard |
| | Master of Aix Annunciation | | Mieris II, Frans van | | Mura, Francesco de |
| | Master of Alkmaar | | Mieris, Willem van | | Murant, Emanuel |
| | Master of Amiens | | Migliara, Giovanni | | Murch, Walter |
| | Master of Antwerp Adoration | | Mignard, Nicolas | | Murer, Christoph |
| | Master of Ávila | | Mignard, Pierre | | Murillo, Bartolomé Esteban |
| | Master of Baroncelli Portraits | | Mignon, Abraham | | Murillo, Gerardo |
| | Master of Castello Nativity | | Mignot, Louis Remy | | Murphy, Hermann Dudley |
| | Master of Codex of Saint George | | Mij, Hieronymus van der | | Murphy, John Francis |
| | Master of Darmstadt Passion | | Mijtens, Daniel | | Murray, David |
| | Master of Die | | Mijtens, Jan | | Musi, Agostino dei |
| | Master of Female Half Lengths | | Milano, Giovanni da | | Music, Antonio Zoran |
| | Master of Fogg Pietŕ | | Millais, John | | Musscher, Michiel van |
| | Master of Frankfurt | | Millais, William Henry | | Muter, Maria Mela |
| | Master of Grossgmain | | Miller, Alfred Jacob | | Muziano, Girolamo |
| | Master of Hartford Still Life | | Miller, Barse | | Myers, Jerome |
| | Master of Heiligenkreuz | | Miller, Kenneth Hayes | | |
