sentences:  Much of the building was modelled on Exeter Cathedral, and as a defence Bishop Bronescombe built three towers, forming one block that acted as a defence both for the college and for the town of Penryn.After its founding in 1265, during the later Middle Ages, Glasney was the largest clerical body in Cornwall, as large as any of the ancient monasteries had been, and with an equivalent income, mainly derived from the rectorial tithes of Budock, Colan, Feock, Kea, Manaccan, Mevagissey, Mylor, St Allen, St Enoder, St Gluvias, St Goran, St Just in Penwith, Sithney, and Zennor.There were no monks at this college or collegiate church, but it had an establishment of one provost and 12 secular canons and held the patronage of sixteen parishes.