| ARTIST | BORN-DIED | PERIOD | SCHOOL |
|---|
| O | OBICI, Giuseppe | (1807-1878) | Romanticism | Italian sculptor (Rome) |
| | OCHTERVELT, Jacob | (1634-1682) | Baroque | Dutch painter (Amsterdam) |
| | ODERISI, Pietro | (active c. 1260-80) | Medieval | Italian sculptor |
| | ODERISIUS OF BENEVENTO | (active 1119-1150) | Medieval | Italian sculptor |
| | ODEVAERE, Joseph-Denis | (1775-1830) | Neoclassicism | Flemish painter |
| | OEHME, Ernst Ferdinand | (1797-1855) | Romanticism | German painter (Dresden) |
| | OGGIONO, Marco d’ | (c. 1467-1524) | Mannerism | Italian painter |
| | OLIVER, Isaac | (before 1568-1617) | Baroque | English miniaturist |
| | OLIVIER, Ferdinand | (1785-1841) | Romanticism | German painter |
| | OLIVIERI, Giovanni Domenico | (1708-1762) | Baroque | Italian sculptor (Madrid) |
| | OLIVIERI, Pier Paolo | (1551-1599) | Mannerism | Italian sculptor (Rome) |
| | OLLIVIER, Michel-Barthélémy | (1712-1784) | Neoclassicism | French painter (Paris) |
| | OMMEGANCK, Balthazar Paul | (1755-1826) | Rococo | Flemish painter (Antwerp) |
| | OMODEO, Giovanni Antonio | (1447-1522) | Early Renaissance | Italian sculptor |
| | OOST, Jacob van, the Elder | (1603-1671) | Baroque | Flemish painter (Bruges) |
| | OOST, Jacob van, the Younger | (1639-1713) | Baroque | Flemish painter (Bruges) |
| | OOSTERWIJK, Maria van | (1630-1693) | Baroque | Dutch painter |
| | OPIE, John | (1761-1807) | Rococo | English painter (London) |
| | OPPENORDT, Alexandre-Jean | (1639-1715) | Baroque | French cabinet-maker (Paris) |
| | ORBETTO (see TURCHI, Alessandro) | (1578-1649) | Baroque | Italian painter (Verona) |
| | ORCAGNA | (c. 1308-c. 1368) | Medieval | Italian sculptor (Florence) |
| | ORDÓÑEZ, Bartolomé | (c. 1490-1520) | High Renaissance | Spanish sculptor |
| | ORIZZONTE (see BLOEMEN, Jan Frans van) | (1662-1749) | Baroque | Flemish painter (Rome) |
| | ORLEY, Bernaert van | (1491/92-1542) | Northern Renaissance | Flemish painter (Brussels) |
| | ORRENTE, Pedro | (c. 1580-1645) | Baroque | Spanish painter (Valencia) |
| | ORSOLINO, Tommaso | (1587-1675) | Baroque | Italian sculptor (Genoa) |
| | ORTELIUS, Abraham | (1528-1598) | Northern Renaissance | Flemish graphic artist (Antwerp) |
| | ORTOLANO | (c. 1487-after 1524) | High Renaissance | Italian painter (Ferrara) |
| | OS, Georgius van | (1782-1861) | Romanticism | Dutch painter (Paris) |
| | OS, Jan van | (1744-1808) | Rococo | Dutch painter (The Hague) |
| | OSONA, Rodrigo de, the Younger | (active 1505-1530) | High Renaissance | Spanish painter (Valencia) |
| | OSTADE, Adriaen Jansz. van | (1610-1685) | Baroque | Dutch painter (Haarlem) |
| | OSTADE, Isaack van | (1621-1649) | Baroque | Dutch painter (Haarlem) |
| | OSTENDORFER, Michael | (c. 1494-1559) | Northern Renaissance | German graphic artist |
| | OTTIN, Auguste | (1811-1890) | Realism | French sculptor (Paris) |
| | OTTONI, Lorenzo | (1658-1736) | Baroque | Italian sculptor |
| | OUDINÉ, Eugène André | (1810-1887) | Realism | French sculptor (Paris) |
| | OUDRY, Jean-Baptiste | (1686-1755) | Baroque | French painter |
| | OUWATER, Albert van | (active 1440-1465) | Northern Renaissance | Netherlandish painter (Haarlem) |
| | OUWATER, Isaak | (1750-1793) | Rococo | Dutch painter (Amsterdam) |
| | OVENS, Jürgen | (1623-1678) | Baroque | German painter |
| | OVERBECK, Friedrich | (1789-1869) | Romanticism | German painter |
