I can't believe I saw this in real life

Raphael's The School of Athens 1509-1510 Fresco in Vatican City, Apostolic Palace

Roman Colosseum by unknown architect, at Rome, Italy, 70 to 82

Caravaggio's The Conversion of Saint Paul 1600-1601 Oil on canvas 90 1/2 x 70 in Cerasi Chapel, Santa Maria del Popolo, Rome