This chapter sets out the historical context to the cardinal as a subject of
portraiture. It engages recent historiography to explain how the cardinal’s
function and role in the Roman Curia, including his relationship to the pope,
developed from the fifteenth century onwards, and how this was reflected in
the range of men who occupied the cardinal’s office. The Sacred College changed
substantially over these centuries, with its proud ‘princes of the Church’ giving
way to an altogether humbler breed of Counter-Reformation cleric. Naturally,
this affected both how cardinals depicted themselves and how they and others
used their depictions.