O
- Gabriele Obermaier
- Liam O’Callaghan
- Isidoro Ocampo
- #occupygezi architecture
- Eva Maria Ocherbauer
- Maria Ocón
- Marcel Odenbach
- Ron O’Donnell
- Monika Oechsler
- Ahmet Ögüt
- Albert Oehlen
- Peter Oehlmann
- Monika Oellerich
- Hester Oerlemans
- Andres Oertelt
- Christoph Oertli
- H. Oesterheld/ Solana Lopez
- Jörg Oetken
- Yasemin Özcan
- Mehmet M. Özdogan
- Erkan Özgen
- Şener Özmen
- Off
- Cornelia Offergeld
- OFOG
- Nana Oforiatta-Ayim
- John O'Grady
- Pablo O'Higgins
- Nathi Oh
- Marc Ohrem-Leclef
- Georgia O'Keeffe
- Mio Okido
- Branwen Okpako
- Azra Deniz Okyay
- Johanna Olausson
- Dr. Harald Olbrich
- Helene von Oldenburg
- Rainer Oldendorf
- Henrik Olesen
- Lissette Olivares
- Ayham Omarin
- Susanne Onken
- Yoko Ono
- open circle
- Open Games
- Julia Opitz
- Teddy von Oppeln
- Dennis Oppenheim
- Can Oral
- David Orange
- Timea Oravecz
- Christian Diaz Orejarena
- Böhler & Orendt
- ORLAN
- Giovanni Orlando
- Ornament & Verbrechen
- Jose Clemente Orozco
- Auro Orso
- Sevgi Ortaç
- Andreas Orth
- Daniela Ortiz
- Sandra Ortmann
- Lotti Ortner-Röhr
- Julia Oschatz
- Polina Osipova
- Lucas Ospina
- Anja Osswald
- Marion von Osten
- Angelika Osterwalder
- Agentur der Fotografen ‘Ostkreuz’ Berlin-Ost
- Tanja Ostojić
- Martin von Ostrowski
- Uwe Oswald
- Jorge Oteiza
- H.C. Ottersbach/ A. Yilmaz
- Margareth Otti
- Michael Ott
- Michaela Ott
- Catrin Otto
- Egle Otto
- Erwin Otto
- Helmut Otto
- Klaus G. Otto
- Marcel Otto
- Ovartaci
- Yuka Oyama & Axel Ruoff
- Yuka Oyama
- Alvaro Oyarzun
- Bernardo Oyarzún
- Ceren Oykut
- Tsuyoshi Ozawa
Please note: The details of people/the projects they took part in are incomplete.