Tenby is a walled seaside town in Pembrokeshire, Wales, on the western side of Carmarthen Bay. Tenby is a city government area. Significant attributes consist of 2 1/2 miles (4.0 km) of sandy beaches and also the Pembrokeshire Coast Course, the 13th century middle ages town walls, consisting of the 5 Arches barbican lodge, Tenby Museum as well as Art Gallery, the 15th century St. Mary's Church, as well as the National Trust's Tudor Merchant's House. The town is offered by Tenby railway station. Boats sail from Tenby's harbour to the offshore reclusive Caldey Island. St Catherine's Island is tidal as well as has a 19th century Palmerston Ft. With its calculated placement on the far west coastline of Britain, as well as a natural protected harbour from both the Atlantic Sea and also the Irish Sea, Tenby was an all-natural settlement point, most likely a hillside ft with the mercantile nature of the negotiation perhaps establishing under Hiberno-Norse influence. The earliest reference to a negotiation at Tenby remains in "Etmic Dinbych", a rhyme possibly from the 9th century, maintained in the 14th century Book of Taliesin.