Ovech Fortress castle

Bulgaria

Overlook Castle

the United States

Ovesholm Castle

Sweden

Private residence

Owiesno

Poland

Oyama Castle

Japan

Oyster Rock

India

Ozalj Castle

Croatia

Ozd

Romania

Ozegna Castle

Italy

Ozeriany Castle

Ukraine

Ozerna Castle

Ukraine

Ozorai Pipó Castle

Hungary

Ozorai Pipó Castle

Hungary

Ozun

Romania

Oława Castle

Poland

Oświęcim Castle

Poland

Pa Deh castle

Iran

Pacco Qillo

Pakistan

Padargad

India

Padenghe Castle

Italy

Padernello Castle

Italy

Padma fort

India

Padma hawa Mahal

India

Padmadurg

India

Padmanabhapuram Fort

India

Pagazzano Castle

Italy

Paide Castle

Estonia

Pajštún Castle

Slovakia

Palace of Ardashir

Iran

Palace of Cortés

Mexico

Palace of Coudenberg Palais du Coudenberg / Coudenbergpaleis

Belgium

Palace of Iturbide

Mexico

Palace of the Grand Master of the Knights of Rhodes

Greece

Hospitaller/Ottoman/Italian period

Palaiokastro

Greece

Hellenistic period

Palakkad Fort

India

Palamidi

Greece

Venetian period