William of Pagula

William of Pagula (died 1332), also known as William Paull or William Poull, was a 14th-century English canon lawyer and theologian best known for his written works, particularly his manual for priests entitled the Oculus Sacerdotis. Pagula was made the perpetual vicar of the church at Winkfield on 5 March 1314, although he neglected his parish for several years to pursue a doctorate in Canon Law from the University of Oxford. After this was granted (probably around 1320) he returned to work with his parish, and his writings are written from the perspective of someone familiar with the job of a rural priest.

As well as the Oculus Sacerdotis, Pagula also wrote the Summa Summarum, a manual of canon law, and the Summa Praelatorum, a "source book" for local parish priests. He has also been linked to two speculua principum addressed to Edward III, which defend the right of royal subjects to refuse purveyance. His writings, particularly the Oculus Sacerdotis, were well received, and the Oculus has been described as the best and most influential of early modern ecclesiastical manuals.