building
structure, typically with a roof and walls, standing more or less permanently in one place
Tel Aviv Dolphinarium
aquarium for sea mammals
O'Connor-Proctor Building
historic place in Victoria, Victoria County, Texas
O. C. Barber Piggery
Barberton, Ohio, NRHP-listed
O. T. Bassett Tower
building in El Paso, El Paso County, Texas
Oak Hill
historic home in Delaplane, Virginia, USA
Oakwood Estate
building in Kentucky, United States
Odd Fellows Building
building in Kentucky, United States of America
Odd Fellows' Home for Orphans, Indigent and Aged
Springfield, Ohio, NRHP-listed
Odd Fellows Hall
building in Idaho, United States
Odd Fellows Temple
building in Ohio, United States
Old Colombo Dutch Hospital
historical building in Colombo, Sri Lanka
Old College Hill Post Office
building in Ohio, United States of America
Old Connaught House
Georgian house in Rathmichael, Dublin, Ireland
Old Germantown Academy and Headmasters' Houses
historic school in Pennsylvania, United States
Old Homestead
historic house in Pennsylvania, United States
Old Louisiana Governor's Mansion
building in Louisiana, United States
Old Pine Street Station
building in Maryland, United States
Old Rock House
listed on the NRHP in McDuffie County
Old Stone Tavern
building in Delaware, United States
Old U.S. Post Office
building in Ohio, United States
Olinger Tower
Colorado Women's College
Olivetti-Underwood Factory
building by Louis Kahn in Pennsylvania
Olney
home and farm complex located at Joppa, Harford County, Maryland
One Great George Street
building in Westminster, London
Orchid Enclave
building in India
Orem's Delight
building in Maryland, United States
Oscar Hammerstein II Farm
building in Pennsylvania, United States
Osgood Farm
building in Massachusetts, United States
Ottumwa Young Women's Christian Association
building in Iowa, United States
Our Lady's Priory
listed building in Aarhus
Overlook
building in West Virginia, United States
Phoenix Tower
office building
Paddy's Markets
building in Australia
Padilla Beard House
building in Massachusetts, United States
Pappenheimer Mansion
building in Georgia, United States
Park Building
building in Ohio, United States
Park Flats
building in Ohio, United States
Park Lodge
building in Massachusetts, United States
Parker-Hutchinson Farm
building in Connecticut, United States
Parker House
historic house in Massachusetts, United States
Parker House
building in Massachusetts, United States of America
Pitt Public Health building
building in Pennsylvania, United States
Patrick McGuinness Three-Decker
historic 'triple decker' building at 25 Suffield Street in Worcester, Massachusetts, U.S
Penn Farm of the Trustees of the New Castle Common
building in Delaware, United States
Pennington Cottage
building in Maryland, United States
Pepsi Centre
building in Newfoundland and Labrador, Canada
Perth Trades Hall
historic building in Perth, Western Australia
pest house
building used for persons afflicted with communicable diseases