The Chester-Holyhead Railway, engineered by Robert Stephenson (1803-59), was one of the mid-19th century’s most important railway undertakings and was particularly significant for the tubular bridges over the River Conwy and the Menai Strait (Britannia Bridge).
This six arched viaduct, marking the eastern end of the Promenade, was built in 1847 of finely dressed limestone to the parapets, with bold projecting string courses which form a shadow line to both sides. The underside of the arches, behind the stone voussoirs, are of brick.
