The last floor of the posterior wing is marked by a succession of rooms and the chapel. The chapel has a single nave, which is covered by a wooden ceiling presenting visible joists. A straight narrow wooden choir, allows access to balconies which extend to the front of the church and the exterior facade, as well as the corridors of the remaining wards. The richly carved wood benches in the nave precede the elevated presbytery, which is delimited by a wooden guardrail.