The funeral monument of Princess Maria Flaminia Odescalchi Chigi is sometimes dubbed the "last Baroque tomb in Rome". It is probably the most visually stunning, exuberant and theatrical sepulchral monument in the basilica. It was built in 1772 for the young princess, the first wife of Don Sigismondo Chigi Albani della Rovere, the 4th Prince of Farnese, who died in childbirth at the age of 20. It was designed by Paolo Posi, a Baroque architect who was famous for his ephemeral architecture built for celebrations, and executed by Agostino Penna. The tomb is located by the pillar between the Chigi and Montemirabile Chapels.