Waterford is located on the sunny south-east coast of Ireland. It is known affectionately as the Deise, derived from the Gaelic tribe that settled there around the fourth century. Waterford city is the oldest city in Ireland, having been founded by the Vikings in 914. Throughout the Middle Ages, Waterford was Ireland's second city, and continues as a key commercial and cultural centre in Ireland today. Although the name Waterford is linked throughout the world with its famous, hand-cut crystal, the diversity of its culture and history can be seen by the castles, churches, and civic buildings throughout the city and county. From the heritage town of Lismore in the west, to the seaside resort of Tramore in the east, Waterford is characterised by the welcome its people give to visitors.