 King Arthur's Hall at Trevena is a substantial building of the early 1930s.It was built for custard powder manufacturer F. T. Glasscock as the headquarters of the "Fellowship of the Knights of the Round Table", behind Trevena House.A variety of Cornish stones are used in the construction and the 73 stained glass windows illustrating the Arthurian tales are by Veronica Whall; there are several paintings of scenes from the life of King Arthur by William Hatherell.