Mathematical Bridge

How it was built

The bridge spans about 15 metres and uses straight timbers arranged as tangents to an arc, so the structure works as an arch even though no piece of wood is curved. That geometry gives it the name. It was repaired in 1866 and rebuilt to the same design in 1905 using teak in place of the original oak. The sides are left open and triangulated, which keeps the bridge stiff and reduces the load from wind.

The Newton myth

You will hear that Isaac Newton designed it and that it was taken apart and could not be reassembled without bolts. The college's own historians are clear that this is false: Newton died in 1727, more than twenty years before it was built, and the 'Newton's Bridge' story only appears in print from the 1890s.

Seeing it

The classic view is from the Silver Street road bridge, a few steps away, or from the river itself on a punt along the Backs. Afterwards, the Anchor and the Mill pubs sit by the water close by, and Fitzbillies, famous for Chelsea buns, is a short walk up Trumpington Street.

Highlights

• Built 1749 to William Etheridge's design
• Arch made entirely of straight timbers
• Rebuilt in teak in 1905
• Best seen from Silver Street bridge or a punt

Good to know

• The bridge is inside Queens' College; you can see it free from Silver Street bridge or the river.

Frequently asked questions