It was probably founded for Augustinian canons in the late 12th or early 13th centuries, and parts of the church (including the site of the high altar), chapter house and cloister can be seen.
Yn ôl pob tebyg, fe’i sylfaenwyd i ganonau Awstinaidd tua diwedd y 12fed ganrif neu ddechrau’r 13eg ganrif, a gellir gweld rhannau o’r eglwys (gan gynnwys safle’r brif allor), y cabidyldy a’r cloestr.