Cossa had a long history of cooperation with Florence, which had viewed him as the legitimate pontiff for a time during the Western Schism. The tomb monument is often interpreted as an attempt to strengthen the legitimacy of Cossa's pontificate by linking him to the spiritually powerful site of the Baptistry. The evocation of papal symbolism on the tomb and the linkage between Cossa and Florence have been interpreted as a snub to Cossa's successor Pope Martin V or vicarious "Medici self-promotion", as such a tomb would have been deemed unacceptable for a Florentine citizen.