the monastic buildings were located on the north side of the priory church. traces of an infirmary were discovered in 1906, when the site of the baptist church was being prepared for building. the surviving buildings were the prior's lodgings. the only recognisable surviving medieval feature is the "sumptuous mid-c15 oriel window" which is often erroneously described as having a connection with geoffrey of monmouth who lived over three centuries earlier, and which in fact is likely to have formed part of the priory gatehouse. the window contains three corbels in the form of carved heads of high quality, although there is some uncertainty as to exactly what they depict: newman describing them as representing "an angel between a civilian and what may be a bedesman", whilst kissack is more empathic in suggesting they portray "a knight, an angel and a miller." the prior's lodgings were extended on several occasions in the nineteenth century when they were used as st mary's national school.