| Maas, Dirck |
| Macchietti, Girolamo |
| MacDonald, Frances E |
| MacDonald, James Harvey |
| Machen, Henry |
| Machuca, Pedro |
| Macke, August |
| MacLeod, William |
| Maclise, Daniel |
| Macomber, Mary L |
| Madeline, Paul |
| Madou, Jean-Baptiste |
| Maes, Nicolaes |
| Maffei, Francesco |
| Magdalen, Master of |
| Maggiotto, Domenico |
| Magini, Carlo |
| Magnasco, Alessandro |
| Maier, John |
| Maignan, Albert Rene |
| Maillart, Diogene Napoleon |
| Mainardi, Bastiano |
| Maincent, Gustave |
| Maino, Fray Bautista |
| Makart, Hans |
| Makovsky, Konstantin |
| Makovsky, Nikolai |
| Malchair, John Baptist |
| Malczewski, Jacek |
| Maler, Hans |
| Malhoa, Jose |
| Mali, Christian Friedrich |
| Mallet, Jean-Baptiste |
| Malouel, Jean |
| Malton, Junior Thomas |
| Mancini, Antonio |
| Mancini, Francesco |
| Mancini, Francesco Giovanni |
| Manescau, Antonio Reyna |
| Manet, Edouard |
| Manetti, Rutilio |
| Manfredi, Bartolomeo |
| Manglard, Adrien |
| Manigault, Middleton |
| Mann, Harrington |
| Mansueti, Giovanni |
| Mantegazza, Giocomo |
| Mantegna, Andrea |
| Mantovano, Rinaldo |
| Manuel, Niklaus |
| Marastoni, Jakab |
| Maratti, Carlo |
| Marc, Franz |
| Marchais, Lucien |
| Marchesini, Alessandro |
| Marchetti, Ludovico |
| Marchisio, Andreas |
| Marcius-Simons, Pinckney |
| Marconi, Rocco |
| Mare, John |
| Marec, Victor |
| Margetson, William Henry |
| Mariani, Pompeo |
| Maricius-Simons, Pinckney |
| Marie, Lobrichon Timoleon |
| Marieschi, Michele |
| Marilhat, Prosper |
| Marina, Segundo Matilla |
| Marinari, Onorio |
| Maris, Jacob Henricus |
| Marks, George |
| Marks, Henry Stacy |
| Marling, Jacob |
| Marlow, William |
| Marmion, Simon |
| Marmitta, Francesco |
| Maroniez, Georges-Philibert-Charles |
| Marple, William |
| Marques, Francisco Domingo |
| Marsal, Edouard-Antoine |
| Marschall, Nicola |
| Marshall, Ben |
| Martens, Conrad |
| Martin, David |
| Martin, Homer Dodge |
| Martin, Jean-Baptiste |
| Martin, John |
| Martin, Pierre-Denis |
| Martineau, Edith |
| Martinelli, Giovanni |
| Martini, Simone |
| Martorell, Bernat |
| Marziale, Marco |
| Mascart, Gustave |
| Masolino, Tommaso |
| Mason, William |
| Massani, Pompeo |
| Massot, Firmin |
| Massys, Cornelis |
| Massys, Jan |
| Massys, Quentin |
| Mastelletta, |
| Masters, painters (2) |
| Masters, unknown (2) |
| Masters, unknown (4) |
| Masters, unknown Austrian |
| Masters, unknown Bohemian |
| Masters, unknown British |
| Masters, unknown painters |
| Masters, unknown printmakers |
| Matejko, Jan |
| Mates, Joan |
| Matham, Jacob |
| Mathies, John Douglas |
| Matteini, Teodoro |
| Matthieu, Georg David |
| Maufra, Maxime |
| Maulbertsch, Franz Anton |
| Maurer, Alfred Henry |
| Maurer, Louis |
| Mauve, Anton |
| Mayer, Constant |
| Mayer, Francis Blackwell |
| Mayer, Friedrich |
| Mayer, Marie-Constance |
| Maynard, George Willoughby |
| Mayr, Johann Ulrich |
| Mazzolino, Ludovico |
| Mazzoni, Sebastiano |
| McArdle, Henry Arthur |
| McClurg, Trevor |
| McCord, George Herbert |
| McEntee, Jervis |
| McIlvaine, Jr. William |
| McKenney, Henrietta |
| McKinstry, George A |
| Meadows, Edwin L |
| Meakin, Lewis Henry |
| Meeker, Joseph R |
| Mei, Bernardino |
| Meiners, Pieter |
| Meissonier, Jean Charles |
| Meissonier, Jean-Louis Ernest |
| Melby, Wilhem |
| Melbye, Anton |
| Melbye, Fritz Georg |
| Melcher, Jakob |
| Melchers, Gari |
| Melendez, Luis |
| Mellan, Claude |
| Mellen, Mary Blood |
| Mellin, Charles |
| Melone, Altobello |
| Melrose, Andrew W |
| Melville, Arthur |
| Melzi, Francesco |
| Memling, Hans |
| Memmi, Lippo |
| Menageot, Francois Guillaume |
| Mengin, Auguste Charles |
| Mengs, Anton Raphael |
| Menzler, Wilhelm |
| Mercier, Philipe |
| Merck, Johann Christof |
| Merisi, Caravaggio |
| Merle, Hughes |
| Merle, Hugues |
| Merritt, Anna Lea |
| Merson, Luc-Olivier |
| Merwart, Paul |
| Mesdag, Hendrik Willam |
| Mesdag, Hendrik Willem |
| Messonier, Jean-Charles |
| Met de Bles, Herri |
| Metcalf, Willard Leroy |
| Metcalfe, Gerald F |
| Metsu, Gabriel |
| Metsys, Quinten |
| Meulener, Pieter |
| Meunier, Constantin |
| Meyerheim, Hermann |
| Meyerheim, Paul Wilhelm |
| Meyerheim, Wilhelm Alexander |
| Michallon, Achille-Etna |
| Michel, Georges |
| Michetti, Francesco Paolo |
| Midgley, William |
| Miel, Jan |
| Migliara, Giovanni |
| Migliaro, Vincenzo |
| Mignard, Pierre |
| Mignon, Abraham |
| Mignot, Louis Remy |
| Mijtens, Jan |
| Mikesch, Fritz |
| Milani, Aureliano |
| Mildorfer, Joseph Ignaz |
| Milet-Mureau, Iphigenie |
| Millais, Sir Everett |
| Millar, Addison Thomas |
| Miller, Alfred Jacob |
| Miller, Charles Keith |
| Miller, William Rickarby |
| Milleson, Royal Hill |
| Millet, Francis David |
| Millet, Francisque |
| Millet, Jean-Francois |
| Millner, William Edward |
| Minardi, Tommaso |
| Minor, Robert Crannell |
| Miralles, Francisco |
| Mirou, Anthonie |
| Mitchell, Charles William |
| Mitelli, Agostino |
| Modersohn-Becker, Paula |
| Modigliani, Amedeo |
| Moeller, Louis C |
| Moeyaert, Claes Cornelisz |
| Mogford, John |
| Moillon, Louise |
| Mola, Antonio and Paolo |
| Mola, Pier Francesco |
| Molenaer, Jan Miense |
| Molenaer, Klaes |
| Molinari, Antonio |
| Molinary, Andres |
| Mollback, Christian Juel |
| Mols, Robert Laurens |
| Molyn, Pieter |
| Mommers, Hendrik |
| Monchablon, Jean Ferdinand |
| Monet, Claude Oscar |
| Monginot, Charles |
| Monks, Robert Hatton |
| Monnoyer, Jean-Baptiste |
| Monogram, Master ab |
| Monogram, Master ac |
| Montagna, Bartolomeo |
| Montaigne, William John |
| Montemezzo, Antonio |
| Montfort, Octavianus |
| Montgomery, Alfred |
| Monticelli, Adolphe-Joseph-Thomas |
| Montigny, Jenny |
| Monvoisin, Raymond Quinsac |
| Mooney, John A |
| Moore, Albert Joseph |
| Moore, Charles Herbert |
| Moore, Claude Stanfield |
| Moore, Harry Humphrey |
| Moore, Henry |
| Mor, Anthonis |
| Mora, Francis Luis |
| Moran, Edward |
| Moran, Edward Percy |
| Moran, Peter |
| Moran, Thomas |
| Morbelli, Angelo |
| Moreau, Adrien |
| Moreau, Gustave |
| Moreau, Jean-Michel |
| Moreelse, Paulus |
| Morel, Jan Evert |
| Morel-Fatio, Antoine Leon |
| Morenhout, Joseph |
| Moret, Henri |
| Morgan, Frederick |
| Morgan, John |
| Morgan, William Penn |
| Morgenstern, Christian |
| Morisot, Berthe |
| Morland, George |
| Morone, Domenico |
| Moroni, Giovanni Battista |
| Morot, Aime-Nicolas |
| Morris, Edmund Montague |
| Morris, Phillip Richard |
| Morrison, Hal Courtney |
| Mortelmans, Frans |
| Morton, John Ludlow |
| Morviller, Joseph |
| Moser, James Henry |
| Moser, Koloman |
| Moskos, Elias |
| Mosler, Henry |
| Mostaert, Gillis |
| Mostaert, Jan |
| Mote, Marcus |
| Motte, Henri Paul |
| Mouchot, Louis Claude |
| Moulinet, Antoine Joseph |
| Moulins, Master of |
| Moullin, Louis |
| Moulthrop, Reuben |
| Mount, Shepard Alonzo |
| Mount, William Sidney |
| Mowbray, Henry Siddons |
| Moynan, Richard Thomas |
| Mucha, Alphonse Maria |
| Muckley, William Jabez |
| Mueller, Alexander |
| Mueller, Otto |
| Mulhaupt, Frederick John |
| Mulier, The Elder Pieter |
| Mulier, The Younger Pieter |
| Muller, Charles Lucien |
| Muller, Jan Harmensz |
| Muller, Leopold Karl |
| Muller, William James |
| Mulready, William |
| Munari, Cristoforo |
| Munger, Gilbert |
| Munier, Emile |
| Munn, George Frederick |
| Munoz, Maximino Pena |
| Munsterhjelm, Hjalmar |
| Muraton, Euphemie |
| Murillo, Bartolome Esteban |
| Murphy, John |
| Murray, Sir Scott |
| Murray, Thomas |
| Musin, Francois Etienne |
| Muziano, Girolamo |
| Myers, Jerome |
| Mygatt, Robertson Kirtland |
| Mytens, Jan |
| Morse, Samuel Finley Breese |
| Malevich, Kazimir |
| Marko, Andres |
| Marko, The Elder Karoly |
| Matteson, Thompkins Harrison |
| Munoz, Bartolome Mongrell |
| Marko, Ferenc |
| Maria Raineri, Francesco |
| Malesskircher, Gabriel |
| Mauperche, Henri |
| Molina, Jose Diaz |
| Martinez, Jusepe |
| Marko, The Younger Karoly |
| Masaccio |
| Merian, The Younger Matthaus |
| Morazzone |
| Maignon, Ramon Tusquets |
| Muller, Rudolph Gustav |
| Menageot, Francois-Guillaume |