The Temple of Augustus is a Grade II* listed building in the Runnymede local planning authority area, England. First listed on 17 November 1986. Ruins.
The Temple of Augustus
- WRENN ID
- stark-brick-crow
- Grade
- II*
- Local Planning Authority
- Runnymede
- Constituency
- Windsor MP: Jack Rankin (Con)
- Country
- England
- Date first listed
- 17 November 1986
- Type
- Ruins
- Address
- The Temple of Augustus, Blacknest Road
- OS grid reference
- SU 974 686
- Coordinates
- 51.40826, -0.60006
- Source
- Historic England listing
Description
The Temple of Augustus comprises Roman ruins and a road bridge, re-erected in the 1820s by Sir Jeffry Wyatville as an elaborate artificial ruin. The materials originated from the Roman city of Leptis Magna in Libya and were presented to the Prince Regent in 1816, initially intended for the Portico of the British Museum. The complex, approximately 225 feet long by 100 feet wide, is designed to be traversed by a carriage road passing under an archway, connecting Windsor Great Park with the grounds of Fort Belvederes.
The ruins are arranged around a carriage road bridge constructed in 1827 of stock brick in Flemish bond, with curved ends and a single horseshoe-shaped pedestrian arch. The parapet was rebuilt in 1904. Bands of stone fragments from Leptis Magna are incorporated into the bridge’s structure, with a Roman archway attached to the north. To the south, fifteen Roman columns of cipollino marble, largely with Corinthian capitals and sections of entablature, arrange in a semi-circular apse, suggesting a temple of Augustus. Approximately ten feet outside this colonnade, Wyatville built a tooled ashlar wall with a semi-circular niche, simulating an outer wall. To the north of the bridge, a series of Roman red and grey granite columns are arranged in two parallel colonnades, some with Corinthian capitals, others with plumed capitals, and others with entablature above. Some column shafts are laid on the ground to create a picturesque arrangement. A stone round-headed arch and wall with domed niches, likely added by Wyatville, are built against the road bridge. The entire composition is considered the most impressive artificial ruin created in Britain.
Local climate
The Temple of Augustus sits in a drier-than-average part of the UK, with an average of 720 mm of rain a year. This makes it drier than 81% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 72% of listed buildings.
It experiences an average of 33 freeze-thaw cycles a year, fewer than 53% of listed buildings. Of these, 14 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
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