A promontory fort is a defensive structure located above a steep cliff, often only connected to the mainland by a small neck of land, thus using the topography to reduce the ramparts needed. The oldest known promontory fort is Amnya I in Siberia which was established as a fortified site in the late 7th millennium BC. Although their dating is problematic, most seem to date to the Iron Age.
A promontory fort is a defensive structure located above a steep cliff, often only connected to the mainland by a small neck of land, thus using the topography to reduce the ramparts needed. The oldest known promontory fort is Amnya I in Siberia which was established as a fortified site in the late 7th millennium BC. Although their dating is problematic, most seem to date to the Iron Age.
Source: Wikipedia "Promontory fort" · CC BY-SA 4.0
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