List of octagonal buildings and structures


file:crossPatheeDome.jpg|thumb|Plan of the Dome of the Rock, Jerusalem
file:tower of the Winds frieze detail.jpg|thumb|The Tower of the Winds in Athens
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

file:Huron Historic Gaol-Huron County Gaol- Goderich-Ontario-12027-20220901.jpg|thumb|Huron Historic Gaol
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

file:AachenerDomDecke.jpg|thumb|Ceiling of the Palatine Chapel in Aachen

Greece

Hungary

India

Iran

Italy

Octagonal Hall, Baths of Diocletian, Rome

Japan

New Zealand

Norway

file:dverberg kirke.jpg|thumb|Dverberg Church with memorial for fishermen who lost their lives at sea

Palestine

Portugal

Singapore

Spain

[file:Jerez de la Frontera-Torre Octógona de noche.jpg|thumb|upright|View of the Octagonal Tower at the Alcazar in Jerez]

Sri Lanka

Sweden

United Kingdom

[file:WellsCathPlanDehio.jpg|thumb|Wells Cathedral plan, showing the octagonal chapter house (top)]