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The Encyclopedia of Horology

Turret clock (verge and foliot, striking train, no dial originally) · England

Salisbury Cathedral Clock

Partially verified

Frequently cited as one of the oldest working clock mechanisms in the world still substantially in its original form, though 'oldest' claims of this kind are always comparative and depend on how much of the mechanism is original fabric versus later restoration.

Technical facts

Escapement
Verge and foliot
Function
Striking the hour on the cathedral bell; no dial in its original arrangement
Drive
Weight-driven

Historical significance

  • Frequently cited as one of the oldest working clock mechanisms in the world still substantially in its original form, though 'oldest' claims of this kind are always comparative and depend on how much of the mechanism is original fabric versus later restoration.
  • Represents the earliest surviving type of mechanical clock escapement, the verge and foliot, before the pendulum.
  • Was restored in the twentieth century after a period of disuse; researchers should treat the proportion of original medieval material versus restored/replacement parts as a distinct research question from the clock's overall date.

Background

The Salisbury Cathedral clock is a large iron-framed tower clock that was designed to strike a bell at precise times. The mechanism is constructed within a four-post wrought iron frame held together with metal wedged tenons. Power is provided by two large stone weights that unwind from wooden barrels as they descend.

One barrel drives the going train regulated by the escapement, while the other drives the striking train regulated by an air brake called a fly. Historically, the clock was housed in a bell tower until it was demolished in 1790, leading to the movement of the mechanism into the cathedral's central tower.

Written from the encyclopedia entries listed under Sources; each statement was checked against the cited text.

Construction and mechanism

  • The clock utilizes a verge and foliot escapement system and lacks a dial.

Later history

  • After being rediscovered in the cathedral tower in 1928, the clock underwent restoration in 1956 to return it to working condition.
  • Testing in the early 1990s demonstrated that the clock could maintain accuracy within two minutes per day.

Photographs

Clock Salisbury Cathedral 01
Clock Salisbury Cathedral 01 — --Immanuel Giel 09:28, 21 August 2007 (UTC), Public domain. Wikimedia Commons file page
Salisbury Cathedral clock - geograph.org.uk - 772882
Salisbury Cathedral clock - geograph.org.uk - 772882 — Hywel Williams, CC BY-SA 2.0. Wikimedia Commons file page
Salisbury Cathedral, medieval clock
Salisbury Cathedral, medieval clock — Rwendland, CC BY-SA 3.0. Wikimedia Commons file page

Photographs are illustrative examples of the type, not necessarily the exact object described. Verify details against the source file page.

Sources & references

  1. Salisbury Cathedral clock, Wikipedia (English), retrieved 2026-10-28 (text CC BY-SA 4.0)
  2. Salisbury Cathedral, published visitor and conservation information
  3. Antiquarian Horological Society, discussion of dating claims for early English turret clocks

Where sources disagree, the disagreement is stated rather than resolved silently.