Opus | Author | School | Born-died |
 | OCHTERVELT, Jacob | Dutch | (b. 1634, Rotterdam, d. 1682, Amsterdam) |
 | ODEVAERE, Joseph-Denis | Flemish | (b. 1775, Bruges, d. 1830, Bruxelles) |
 | OLIVER, Isaac | English | (b. before 1568, Rouen, d. 1617, London) |
 | OOST, Jacob van, the Elder | Flemish | (1603-1671) |
 | OOST, Jacob van, the Younger | Flemish | (b. 1639, Brugge, d. 1713, Brugge) |
 | OOSTERWIJK, Maria van | Dutch | (b. 1630, Nootdorp, d. 1693, Uitdam) |
 | ORCAGNA | Italian | (b. ca. 1308, Firenze, d. ca. 1368, Firenze) |
 | ORLEY, Bernaert van | Flemish | (b. 1491/92, Bruxelles, d. 1542, Bruxelles) |
 | ORRENTE, Pedro | Spanish | (b. ca. 1580, Monte Alegre, d. 1644, Valencia) |
 | ORTOLANO | Italian | (b. ca. 1487, Ferrara, d. after 1524, Ferrara) |
 | OSONA, Rodrigo de, the Younger | Spanish | (active 1505-1530 in Valencia) |
 | OSTADE, Isaack van | Dutch | (b. 1621, Haarlem, d. 1649, Haarlem) |
 | OUDRY, Jean-Baptiste | French | (b. 1686, Paris, d. 1755, Beauvais) |
 | OUWATER, Albert van | Flemish | (active mid-15th century in Haarlem) |
 | OUWATER, Isaak | Dutch | (1750-1793) |
 | OVERBECK, Friedrich | German | (b. 1789, Lübeck, d. 1869, Roma) |
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