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Found 14246 castles (showing 10189-10200)

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Ruins

Oberwallsee Castle

Bad Mühllacken, Austria

Oberwallsee Castle is a medieval hill castle ruin above Bad Mühllacken, Upper Austria, dating back to the 14th century.

Late Medieval (14th–15th c.)
Details

Oberwerris Castle

Hamm, Germany

Oberwerris Castle features a 17th-century Renaissance brick structure with sandstone trim and a historic baroque garden.

Renaissance (15th–17th c.)
Details
Obi Castle — Japan castle
Partially Preserved

Obi Castle

Nichinan, Japan

Obi Castle, a 15th-century hill castle in Nichinan, Japan, known for its Edo Period samurai heritage and strategic history.

Details
Obišovský hrad — Slovakia castle
Ruins

Obišovský hrad

Obišovce, Slovakia

Obišovský hrad is a medieval hill castle ruin near Obišovce, Slovakia, with origins as a Slavic hillfort from Roman times.

Late Medieval (14th–15th c.)
Details
Partially Preserved

Obrovac Castle

Obrovac, Croatia

Obrovac Castle is a late medieval fortress in Croatia, built in the 14th century by the Kurjaković family and later rebuilt by Venetians.

Late Medieval (14th–15th c.)
Details
Observatory Bistrik kula — Bosnia and Herzegovina castle
Ruins

Observatory Bistrik kula

, Bosnia and Herzegovina

Observatory Bistrik kula is a 20th-century archaeological ruin in Bosnia and Herzegovina with historical scientific significance.

Contemporary (20th–21st c.)
Details
Well Preserved

Observatory Castle of Abbadia

Hendaye, France

Neo-Gothic Observatory Castle of Abbadia in Hendaye, built 1864-1879 by Eugène Viollet-le-Duc for astronomer Antoine d'Abbadie.

Modern (19th–20th c.)
Details
Well Preserved

Ochiltree Castle

Linlithgow, United Kingdom of Great Britain and Northern Ireland

Ochiltree Castle is a 16th-century Renaissance L-plan tower house in Linlithgow, featuring bartizans and historic Stirling family connections.

Renaissance (15th–17th c.)
Details
Ochsenstein Castle — France castle
Ruins

Ochsenstein Castle

Reinhardsmunster, France

Ochsenstein Castle is a medieval hill castle complex in Reinhardsmunster, France, featuring three sandstone fortresses from the 12th century.

High Medieval (11th–13th c.)
Details
Ockenfels Castle — Germany castle
Restored

Ockenfels Castle

Ockenfels, Germany

Ockenfels Castle is a restored 13th-century hill castle overlooking the Rhine, blending medieval ruins with 20th-century romantic reconstruction.

High Medieval (11th–13th c.)
Details
Oda Castle — Japan castle
Archaeological Site

Oda Castle

Tsukuba, Japan

Oda Castle is a Muromachi period hira-style castle in Tsukuba, Ibaraki, protected as a National Historic Site since 1935.

Details
Odani Castle — Japan castle
Ruins

Odani Castle

Nagahama, Japan

Odani Castle, a renowned Japanese hill castle built in 1524, played a key role in Sengoku-era conflicts and remains a scenic ruin.

Renaissance (15th–17th c.)
Details
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