Petit Pont is a location used in Rhythm Thief & the Emperor's Treasure. It can be accessed from Place Henri-Mondor, Notre Dame Cathedral or Paris Constabulary. Brigitte and Lazare can be seen here.
The chick sound can be recorded here, and in Chapter 8, the kiss sound can be recorded from Brigitte. Battle Diabolique's sound disk is also hidden here, as well as the final fragment of the Phantom Notes.