Vatican Museums, official collection page, "Consegna delle Chiavi" (Perugino)

A citation to the Vatican Museums' own official collection page for this fresco, read directly in Italian through the museum's public website (museivaticani.va). Its strength is a directly examined institutional page from the fresco's custodian, including the museum's own reading of the scene as a conferment of powers to the first vicar of Christ. Its limit is that the page itself is concise; the surrounding art historical account of the wall's wider fresco cycle and its Renaissance patronage draws on general scholarship rather than the page's text alone.