This tiny church is exquisitely decorated by artists from different periods. On the façade, above the entrance outside, is a fresco by Johann Friedrich Overbeck (1829), depicting St Francis receiving from Christ and the Virgin the indulgence, known as the “Pardon of Assisi”. The German painter Overbeck was a member of the Nazarene movement, a group of painters who aimed to revive honesty and spirituality in Christian art. At the base of this fresco is a small rectangular fresco beneath which are the Latin words "Haec est porta vitae aeternae" ("This is the gate to eternal life").