Antipope Felix V
Antipope Felix V made him a pseudocardinal on 6 April 1444 in Geneva, offering him the titular church of San Marcello al Corso. Estaing refused Felix V's offer to make him a cardinal, instead choosing to side with Pope Nicholas V, who absolved him for his earlier support of Felix. In the consistory of 19 December 1449, Nicholas V made Estaing a cardinal priest, awarding him the titular church of Santa Sabina on 12 January 1450. Estaing entered Rome on 30 November 1450 and received the red hat the next day.