OBICI, Giuseppe
(1807-1878) Romanticism Italian sculptor (Rome)
ODILON Redon (Bertrand-Jean Redon)
(1840-1916) famous French Symbolist painter, printmaker, draughtsman and pastellist
OCHTERVELT, Jacob
(1634-1682) Baroque Dutch painter (Amsterdam)
ODERISI, Pietro
(active 1260-80) Medieval Italian sculptor
ODEVAERE, Joseph-Denis
(1775-1830) Neoclassicism Flemish painter
OEHME, Ernst Ferdinand
(1797-1855) Romanticism German painter (Dresden)
OGGIONO, Marco d’
(1467-1524)Mannerism Italian painter
O'KEEFE, Georgia Georgia Totto O'Keeffe
(1887-1986) American artist.
OLDENBURG, Claes
(born 1929) Swedish-American sculptor, best known for his public art installations typically featuring very large replicas of everyday objects. Another theme in his work is soft sculpture versions of everyday objects.
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
(1308-1368) Medieval Italian sculptor (Florence)
ORDÓÑEZ, Bartolomé
(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
(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
(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 Adriaen van Ostade (Adriaen Hendricx) was born in 1610 in Haarlem. His father, Jan Hendricx, came from Ostade near Eindhoven, and his sons, Adriaen and Isaack, adopted this name as painters. In 1627, Adriaen was a pupil of Frans Hals, and, in 1634 joined the Lukas Guild in Haarlem of which he was later the head, in 1647, 1661 and 1662. He was one of the most popular Dutch painters, specializing from the start in genre painting of peasant life. In his early period, A. van Ostade was under the influence of A. Brouwer, in the 1640s of Rembrandt. From about 1650 his paintings turned more and more towards Delft genre painting, the interiors became more pleasant, and open-air scenes were added. Adriaen van Ostade had many pupils and followers, the most important among them were his younger brother, Isack,  Jan Steen, Cornelis Dusart, and Cornelis Pietersz Bega. The artist died in Haarlem in 1685.
OSTADE, Isaack van
(1621-1649) Baroque Dutch painter (Haarlem)
OSTENDORFER, Michael
(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