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The Menai Suspension Bridge from a viewpoint on the A4080 near the Britannia Bridge.

Menai Suspension bridge being painted -August 2005

The bridge as pictured in a Staffordshire stoneware plate in the 1840s. - (From the home of J L Runeberg)

2.5 second exposure of the Menai Suspension Bridge in the evening

The Menai Suspension Bridge On A 2005 British £1 Coin.

The Menai Suspension Bridge or Pont Grog y Borth in Welsh is a suspension bridge between the island of Anglesey and the mainland of Wales. Designed by Thomas Telford and completed in 1826, it is considered the first modern suspension bridge in the world.

Prior to the bridge's completion in 1826 the island had no connection to the mainland and all movement to and from Anglesey was by ferry (or, with difficulty, on foot at low tide). However, the Act of Union 1800 increased the need for transport to Ireland, and with Holyhead as one of the principal terminals to Dublin it was decided that a bridge was needed.

Thomas Telford was assigned the task of improving the route from London to Holyhead, and one of the key improvements was his design of the suspension bridge over the Menai Strait between a point near Bangor on the mainland and what was then the village of Porthaethwy which is now also known as Menai Bridge on Anglesey. The design of the bridge had to allow sailing ships 100 ft tall to pass under the deck at high water slack tide.

Construction of the bridge began in 1819 with the towers on either side of the strait. These were constructed from Penmon limestone and were hollow with internal cross-walls. Then came the sixteen huge chain cables, each made of 935 iron bars that support the 176 metre span. To avoid rusting, each cable was first soaked in linseed oil. The bridge was opened to much fanfare on January 30, 1826, and succeeded in reducing the 36 hour journey time from London to Holyhead by 9 hours. The bridge was not the first suspension bridge, but was so hugely greater than anything previously built that it is considered the world's first modern suspension bridge.

Damaged by winds in 1839, the road surface needed extensive repair, and in 1893 the entire wooden surface was replaced with a steel deck. Over the years, the 4.5 ton weight limit proved problematic for the increasing freight industry and in 1938 the original iron chains were replaced with steel ones without the need to close the bridge. In 1999 the bridge was again closed for around a month to resurface the road and strengthen the structure, requiring all traffic to cross via the nearby Britannia Bridge.

On February 28, 2005 the bridge was promoted to UNESCO as a candidate World Heritage Site, and, coincidentally on the same day one carriageway of the bridge was closed for six months restricting traffic to a single carriageway so that traffic now travelled to the mainland in the morning and to Anglesey in the afternoon.

The bridge was finally re-opened to traffic in both directions on the 11th December 2005 after its first major re-painting in 65 years.

The nearest village is the village of Llanfair PG.

The Anglesey Coastal Path passes below the bridge. The bridge has a memorial to the Aberfan disaster victims on the Anglesey side.

A representation of the Menai Bridge inside a border of railings and stanchions is featured on the reverse of British one pound coins minted in 2005. The coin was designed by Edwins Ellis.

White Knight to Alice:

"I heard him then, for I had just completed my design,

To keep the Menai bridge from rust

By boiling it in wine."

Haddocks eyes, Through the Looking-Glass, Lewis Carroll

Uchelgaer uwch y weilgi - Gyr y byd

Ei cherbydau drosti;

Chwithau oll longau y lli

Ewch o dan ei chadwyni.

Dewi Wyn o Eifion (David Owen) (1784-1841)

High fortress above the sea - the world drives

Its carriages across it;

And you, all you ships of the sea,

Pass beneath its chains.

• Prosiect Menai The new site of Prosiect Menai, who aim to create a museum and education centre based on the story of the bridges over the Menai Strait.

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• Anglesey History History of the bridges over the Menai Strait.

Coordinates: 53°13′12.5″N, 4°9′47.25″W