Bagillt (; ) is a market town and community in Flintshire, Wales. The town overlooks the Dee Estuary and is between the towns of Holywell and Flint. At the 2001 Census the population was recorded as 3,918, increasing to 4,165 at the 2011 census. The community also includes the villages of Walwen and Whelston. Landmark locations such as Gemma Rushes bath. History Bagillt was part of the Kingdom of Gwynedd in the early medieval period. In the 12th century, Owain Gwynedd and his forces retreated to Bryn Dychwelwch, the "Hill of Retreat", above Bagillt while being pursued by superior numbers of Henry II's forces. Castell Hen Blas, a motte-and-bailey castle, lies within the boundaries of Bagillt. It was the birthplace of Dafydd ap Llywelyn, Prince of Wales, probably around Easter 1212. The castle ruins were partially excavated in the mid-1950s. Dafydd's birth was commemorated by the unveiling of a plaque on the wall of the Upper Shippe Inn in the centre of the village on 25 July 2010; this was 770 years since the issue of his earliest surviving charter as prince. Mostyn Hall, the seat of one of the oldest Welsh families, lies close to Bagillt. Parts of the building date from the time of Henry VI in the 15th century. The future Henry VII is said to have been concealed in the Hall by the lord of Mostyn, Richard ap Howel, during the reign of Richard III. The Hall now houses antiquities and manuscripts pertaining to British and Welsh history that were brought from Gloddaeth Hall, Llanrhos. Industrial Revolution The Gadlys Lead Smelting Works was established by Edward Wright and his associates, who were generally Quakers, in 1704. Organised as the London Lead Company, they kept the workshop open until 1799. John Freame, one of the founders of Barclays Bank, was involved in this initiative. By the late 18th century, Bagillt had become a centre of mineral extraction and manufacturing. Hundreds of men laboured in eleven collieries that surrounded the village. There was also a factory and works that produced and refined zinc, lead and iron. Bagillt already had several quays on the banks of the River Dee, where fishing boats had moored for centuries. But by the early 19th century, these had grown into docks where cargo destined for the factories and foundries of England were loaded. In 1846, navvies laying track for the North Wales Coast