The Cappella Lancellotti, which is dedicated to St Francis of Assisi, was founded by Cardinal Scipione Lancellotti, who was buried here in 1598.
The original edifice was designed in outline by Carlo Maderno, but the work was executed by Francesco Capriani Il Volterra who began in 1585. The dome was finished in 1588, and the chapel was consecrated in 1590. However there was a major restoration in 1674 by Giovanni Antonio de' Rossi, which amounted to a rebuilding.
Vault
The vault has four stucco tondi by Filippo Carcani, also known as Il Filippone. They depict: St Francis Before the Crucifix at San Damiano, St Francis in the Lateran Basilica, The Approval of the Rule of St Francis by the Pope and St Francis Dying.
Altar
The altar is crowned with three angels and a host of putti. The altarpiece depicts St Francis Receiving the Stigmata by Giovanni Battista Puccetti.
Altar
On the left side of the chapel there is a monument to Ottaviano Lancellotti-Ginetti (1858), while on the right there is one to Giuseppina Massimi-Lancellotti (1862).