Primacy of the Bishop of Rome
（重定向自Petrine Theory）
![Early manuscript illustration of the First Council of Constantinople](/Images/godic/202502/02/Council_of_Constantinople_381_BnF_MS_Gr510_fol3550419.jpg")
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![Stained glass at St John's Ashfield, illustrating Jesus' description of himself, "I am the Good Shepherd", from the Gospel of John, chapter 10, verse 11.](/Images/godic/202502/02/StJohnsAshfield_StainedGlass_GoodShepherd_Portrait_cropped0419.jpg")
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The primacy of the Bishop of Rome is an ecclesiastical doctrine concerning the respect and authority that is due to the pope from other bishops and their sees.
English academic and Roman Catholic priest, Aidan Nichols, wrote that "at root, only one issue of substance divides the Orthodox and the Catholic Churches, and that is the issue of the primacy."