Enzo Jannacci as Amedeo

Claudia Cardinale as Aiche

Ugo Tognazzi as Aureliano Diaz

Michel Piccoli as Padre Amerin

Vittorio Gassman as Principe Donati

Alain Cuny as teologa Belga

Daniele Dublino as frate Ambrogio

Sigelfrido Rossi as Giovanni Rossi

Irena Oberberg as Luisa

Maalerer Bergier as Cardinale tedesco

Dante Cleri as

Luigi Scavran as

Giuseppe Ravenna as Segretaria

Mario Jannilli as Una guardia svizzera

Enzo Mondino as

Attilio Pelegatti as

Bruno Bertocci as

Paul VI. as Himself (archive footage)

John XXIII. as Himself (archive footage)