There is evidence of prehistoric occupation of the area, but the first recorded mention of the town dates from the 13th century, when Edward I of England granted a charter for Keswick's market, which has maintained a continuous 700-year existence. The town was an important mining area, and from the 18th century has been known as a holiday centre; tourism has been its principal industry for more than 150 years. Its features include the Moot Hall; a modern theatre, the Theatre by the Lake; one of Britain's oldest surviving cinemas, the Alhambra; and the Keswick Museum and Art Gallery in the town's largest open space, Fitz Park. Among the town's annual events is the Keswick Convention, an Evangelical gathering attracting visitors from many countries.