Admiralty Arch, in Holyhead, Anglesey, was built in 1824 to mark the end of Thomas Telford's Holyhead road.[1] The arch was designed by Thomas Harrison and its main purpose was to commemorate the visit of King George IV in August 1821.[2] The King arrived in Holyhead on the royal yacht Royal George on the 7 August, continuing to Plas Newydd where he stopped overnight. He returned the next day to his yacht, but due to poor weather his departure was delayed and the decision was made to transfer to the steam packet Lightning which conveyed him on the 12 August to Howth, near Dublin for his state visit to Ireland. The change to the packet boat was met with widespread approval.[3][4]