• Onisa, Silvia Also featuring landcapes and flowers. http://www.onisaart.alphanet.ro/

• Online Artist Gallery List of artists with artwork. $15/month http://www.gallerybox.com/

• Online galleries for Today's Emerging Artists Modern Day Masters provides emerging artists with online galleries. http://www.moderndaymasters.com/

• Orback, Craig Contains portfolio of editorial and publishing work, as well as portraits. http://www.craigorback.com/

• Orchowski, Allen Offers several figurative, realist pieces. http://www.orchowski.com/

• Original Artwork Strange paintings and drawings for you to enjoy. http://www.originalartwork.co.uk/

• Orman, Nathaniel California artist featuring world traveling photojournals, expressionist oil paintings, seriograph and woodblock prints, and digital artwork. http://www.wayout.com/

• Ornstein, Michael Marisi Features original oil paintings, films, and bio. http://www.monkeylanguage.com/

• Orsillo, Bob Offers limited and open editions works. Information about the artist, image galleries of works, press releases. http://www.orsillo.com/

• Ortego, Blanquie Gallery of oil paintings and resume. http://www.ortego.ciberia.com

• Osserman, Georgette L. Painter based in California who works in oil, pastel, and mixed media. Features figurative, landscape, and abstract collections. http://www.gette.com/

• Ossiander, Glenn Portfolio of large scale abstract color-field paintings in acrylic by PAFA trained, Los Angeles-based painter. Includes images, pricing, descriptive information, and a biography. http://www.glennossiander.com/

• Osterloh, Ulrich Colorful abstract paintings. http://www.osterlohart.de

• Ostrerov, Boris Artist, gallery, art, pastel, oil, watercolor, acrylic, charcoal, Boris, oil pastel, drawing, painting, impressionism and more. http://www.borisfineart.com/

• Ostrovsky, Victor Biography, pictures, and paintings by the former Mossad case officer and author. http://www.ostenart.com/

• Otmane, Pascale Includes portraits and still life. http://www.pascale-otmane.com/

• Otschik, Angelika Featuring dream and fantasy inspired fabric paintings. http://www.ao-dreamart.de/

• Otsuka, Hisashi Images by a contemporary Japanese artist. http://www.hisashiotsuka.com

• Ottevanger, Susan Contemporary and impressionistic marine wildlife paintings. http://www.seewater.com/

• Otto, Bert Specializes in watercolour, acrylics, figurative, abstract, and impressionistic. http://www.aotto.demon.nl