8 miles NW of Ruthin, the town (population 8,800) grew around the glove-making industry. The first Borough Charter was granted to Denbigh in 1290, when it was still contained within the old town walls. Denbigh Castle was begun in 1282 with the support of King Edward I; the site is dominated by an impressive triple-towered gatehouse. In 1643, Denbigh became a refuge for a Royalist garrison during the English Civil War.
Surrendering in 1646, the castle and town walls eventually fell into ruin. Llyn Brenig to the north of Cerrigydrudion near Denbigh is a large lake surrounded by heather moorland and spruce forests and the Visitor Centre has an exhibition on its history.