 The Bishop 's Palace lies within the Liberty of St Andrew , which encloses the cathedral , the Bishop 's Palace , Vicar 's Close and the residences and offices of the clergy who serve the cathedral . The palace is accessible from the adjacent market place through an archway known as The Bishop 's Eye in the gatehouse to the walled precinct . The Bishop 's Eye was built around 1450 , by Bishop Beckington . It is a three @-@ storey building of Doulting ashlar stone , with a copper roof and has been designated as a Grade I listed building . The Bishop 's Eye forms one of a pair with the Penniless Porch which is the gateway into the Cathedral from the market place , which was built at the same time and in a similar style . 
