C14 work but was virtually rebuilt in the C19.
Most of the windows have coloured glass (mostly by C E Kempe and Co), grisaille in the clerestory, narrative in the aisles.
An excellent description of the history, the interior and the memorials is contained in the "Guide to the Church of St John the Baptist, Frome, Selwood" Rich detailing, the baptistary has splendid pavement and carved draper dado (also contains the John Stevens memorial. Lady Chapel (Boyle family vault) which is ornate and has a Norman doorway, C15 corbels and a number of marble memorials (2 by R Westmacott) plus a shrouded cadaver said for no reason to be that of Edmund Leversedge (buried at Westbury).