Octagon buildings and structures are characterized by an octagonal plan form, whether a perfect geometric octagon or a regular eight-sided polygon with approximately equal sides.
The oldest surviving octagon-shaped building is the Tower of the Winds in Athens, Greece, which was constructed circa 300 B.C.; the Pharos also had octagonal design elements but no longer stands. Octagon houses were popularized in the United States in the mid-19th century and there are too many to list here, see instead the list of octagon houses. There are also octagonal houses built in other times and cultures.
Below is a list of octagonal buildings and structures worldwide, excluding houses and windmills.
Australia
Canada
At least 19 historic octagon houses are known to exist in Canada distributed across 4 eastern provinces. For a list of these houses, See: List of octagon houses. In Canada, the octagon house craze also engendered an octagonal deadhouse phenomenon. This included octagonal deadhouses, pre-burial edifices, built in the mid to late 1800s along Yonge Street in south-central Ontario, from just north of Toronto to Aurora.
China
Egypt
Ethiopia
Germany
Greece
Hungary
India
Iran
Israel
Italy
Japan
- Yumedono at HÃ
ÂryÃ
«-ji, Ikaruga (739)
- Octagonal Hall of Eisan-ji, GojÃ
 (760-764)
- HokuendÃ
 of KÃ
Âfuku-ji, Nara (1210)
- SaiendÃ
 of HÃ
ÂryÃ
«-ji, Ikaruga (1250)
- Main Hall of Keikyuin of KÃ
ÂryÃ
«-ji, Kyoto (1251)
- Three-Story Pagoda of Anraku-ji, Ueda (1290s)
- AizendÃ
 of TÃ
Âfuku-ji, Kyoto (1333-92)
- Main Hall of BusshÃ
Â-ji, Mito (1585)
- NanendÃ
 of KÃ
Âfuku-ji, Nara (1789)
- Nippon Budokan, Tokyo (1964)
- Pagoda of Genjo Sanzoin Complex in Yakushi-ji, Nara (1991)
- Sugamo Ohdai KannondÃ
 in Taisho University, Tokyo (2013)
New Zealand
- The Octagon, the former Trinity Congregational Church in Christchurch, New Zealand
Norway
Portugal
- Convent of Christ (Tomar, Portugal), 12th-15th Century. The adjacent chapel is only one of two octagonal chapels in the world. The other is in Jerusalem.
- Charola, Portuguese Info on the Chapel of the Convent of Christ.
Singapore
Spain
Sri Lanka
Sweden
United Kingdom
- Abbot's Kitchen, Glastonbury
- Abbot's Kitchen, Oxford
- Avenue Methodist Church in Sale, Greater Manchester
- Dutch Cottage, Rayleigh, Essex
- Eighteenth century replicas of the Athenian Tower of the Winds in the ornamental gardens of the following stately homes:
- Mount Stewart
- Shugborough Hall
- West Wycombe Park
- Jubilee Tower, Lancashire
- Naze tower, Walton on the Naze
- Octagon, Birmingham the world's tallest octagonal residential skyscraper.
- Octagonal chapter houses at the following cathedrals:
- Liverpool Cathedral
- Salisbury Cathedral
- Southwell Minster
- Truro Cathedral
- Wells Cathedral
- York Minster
- Octagon Centre, Sheffield
- Octagonal lantern tower, Ely Cathedral, Ely
- Octagon Chapel, Norwich
- Octagon Temple at Cliveden
- Dreghorn & Springside Parish Church
- St James Church, Teignmouth
- Great Pagoda, Kew Gardens, London
- Storm Tower at Compass Point, Bude, Cornwall
- St. JohnâÂÂs Methodist Church, Arbroath
- United Reformed Church in Cheadle Hulme
- The main tower of Hadlow Castle, Kent
- The Butter Market, Barnard Castle, County Durham
- Hertford College's Middle Common Room, Oxford
- Octagonal Tower, Cardiff Castle, Cardiff, built by Robert Beauchamp 1425
- Octagonal drawing room, Castell Coch, Tongwynlais, Cardiff, built by William Burges for John Crichton-Stuart, 3rd Marquess of Bute, 1870s
- All seven towers of Caernarfon Castle, Caernarfon, built by James of St George for Edward I, late thirteenth century
- Porth-y-TÃ
µr, St Davids, Wales, thirteenth century
United States
See also
References