Organisation for Economic Co-operation and Development 47,539 Ovid, 43 B.C.-17 A.D. or 18 A.D 5,552 Offenbach, Jacques, 1819-1880 3,931 Ormandy, Eugene, 1899-1985 3,471 Oecd 3,133 Oxford University Press 2,992 Ōta, Tōshirō 2,287 Obama, Barack 2,180 Oak Ridge National Laboratory 2,153 Orthodox Eastern Church 1,968 Omar Khayyam 1,627 Organisation de coopération et de développement économiques 1,602 O'Neill, Eugene, 1888-1953 1,458 Obichere Collection 1,431 Orchestre de la Suisse romande 1,353 Ohio 1,314 O'Keeffe, John, 1747-1833 1,244 Organisation for European Economic Co-operation 1,186 Osler, William, Sir, 1849-1919 1,152 OECD Nuclear Energy Agency 1,139 Optical Society of America 1,120 Open University 1,106 Österreichische Nationalbibliothek 1,066 Oxford Academic eCollections 1,054 Organisation for Economic Co-operation and Development Development Centre 1,046 Orff, Carl, 1895-1982 1,043 Owen, John, 1616-1683 1,041 Oistrakh, David, 1908-1974 1,038 Olmerṭ, Ehud 959 Otway, Thomas, 1652-1685 954 Organization of American States 920 Opus Arte (Firm) 909 Oliphant, Mrs (Margaret), 1828-1897 888 Origen 864 Orchestre national de France 828 Orchestre de Paris 827 Ozawa, Seiji, 1935- 818 Orville H. Bullitt Classics Fund 813 Owen, Robert, 1771-1858 805 Ockeghem, Johannes, approximately 1410-1497 795 O.W. Ketcham Terra Cotta Works 794 Ozawa, Seiji, 1935-2024 789 Opéra-Comique (Paris, France) 747 Optic, Oliver, 1822-1897 745 Orwell, George, 1903-1950 743 Oregon 728 Oppenheim, E. Phillips (Edward Phillips), 1866-1946 723 Orchestre des concerts Lamoureux 713 Opéra de Paris 708 Otter, Anne Sofie von 708 Ouyang, Xiu, 1007-1072 704 Oates, Joyce Carol, 1938- 689 Obrist, Hans Ulrich 685 Organization of American States General Secretariat 679 O.R.S.T.O.M. (Agency : France) 633 Ostrovsky, Aleksandr Nikolaevich, 1823-1886 629 Office for Official Publications of the European Communities 624 O'Rourke 614 Ortega y Gasset, José, 1883-1955 608 Ogilby, John, 1600-1676 589 Oz, Amos, 1939-2018 589 Osborn, Henry Fairfield, 1857-1935 575 Ortelius, Abraham, 1527-1598 554 Ormonde, James Butler, Duke of, 1610-1688 551 Ohio State University 547 Oxenford, John, 1812-1877 547 Oregon Department of Geology and Mineral Industries 534 Ovid, 43 B.C.-17 or 18 A.D 530 Ontario 529 Obrecht, Jacob, -1505 521 Österreichische Akademie der Wissenschaften 521 Ouida, 1839-1908 519 Orion Pictures 518 Ostermeyer, Robert 517 Office of the United Nations High Commissioner for Refugees 513 Österreichischer Rundfunk 511 Ostwald, Wilhelm, 1853-1932 509 Ohio Division of Geological Survey 503 Onslow, Georges, 1784-1853 500 Olivier, Laurence, 1907-1989 493 Orchestre de chambre de Lausanne 493 Österreichisches Statistisches Zentralamt 488 Olson, Charles, 1910-1970 484 Orchestra of the Age of Enlightenment 475 Oren, Mosheh (Surveyor) 469 Orchestre symphonique de Montréal 463 Orchestre national de l'O.R.T.F 461 Organisation for Economic Co-operation and Development Staff 461 Oklahoma Geological Survey 451 Olive Films 448 Oldmixon, Mr (John), 1673-1742 447 Office for the Arts at Harvard & Radcliffe 439 Öffentliche Kunstsammlung Basel 439 Overbrook Press 438 Österreichisches Museum für Angewandte Kunst 434 Olmsted, Frederick Law, 1822-1903 431 Opéra de Paris Orchestre 429 Owen, Robert Dale, 1801-1877 412 OECD 410 O'Hara, John, 1905-1970 406