What does this number measure?
Strictly speaking, the name Big Ben refers to the great bell; the reference represents the tower. Displayed dimension: tower height.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Catalogue value to check against the source; not individually audited.
Detailed interpreted illustration. It is not a photograph, an architectural survey or an exact scientific reconstruction.
Clock commissioned: 1859. Proposed historical date; an existing documentary source is linked but was not consulted for this date in this session. Do not interpret this reference as the manufacturing date of the illustrated specimen. Date when the monument's clock entered service; the name “Elizabeth Tower” dates from 2012.
