- O-14 Tower: guscio in cemento armato traforato
- OBR vincitore assoluto dei LEAF Awards 2011
- OBR wins the Green Good Design Award 2012 in Chicago
- Obsessed with geometry and symmetry? You will love "Viennametry"
- Ocean Avenue Project: first Gehry-designed building in Santa Monica
- Ocean House designed by Roger Ferris + Partners on Rhode Island
- OCEANIX Busan unveiled: the world’s first prototype floating city that adapts to sea level rise