Ordnance Survey Obelisk is a Grade II listed building in the Waltham Forest local planning authority area, England. First listed on 24 February 1987. A C19 Monument.

Ordnance Survey Obelisk

WRENN ID
wild-lead-heron
Grade
II
Local Planning Authority
Waltham Forest
Country
England
Date first listed
24 February 1987
Type
Monument
Source
Historic England listing

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Description

The Ordnance Survey Obelisk is a granite monolith erected in 1824, standing over eight feet high. It features battered sides and a flat top, with an inscribed plaque inset. This obelisk was established to indicate the direction of true north from the Royal Observatory at Greenwich. Notably, the meridian was altered in 1850, and the point of zero now lies 19 feet to the east of the obelisk.

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