sentences:  Initially it had not been unusual for religious houses in possession of rectories also to assume the capability to collect tithe and glebe income for themselves, but this practice was banned by the decrees of the Lateran Council of 1215.Thereafter, over the medieval period, monasteries and priories continually sought papal exemption from the Council's decrees, so as to appropriate the income of rectoral benefices to their own use.However, from the 13th century onwards, English diocesan bishops successfully established the principle that only the glebe and 'greater tithes' of grain, hay and wood could be appropriated by monastic patrons in this manner; the 'lesser tithes' had to remain within the parochial benefice; the incumbent of which thenceforward carried the title of 'vicar'.