Located on Réunion Island, a French territory in the Indian Ocean, the church is subject to a tropical climate characterized by high humidity, heat, and intense seasonal rainfall — conditions that significantly affect mural conservation.

The decorative program consists of a combination of paintings executed directly on plaster and canvases adhered to walls using the French marouflage technique. Capillary rising damp within the masonry caused localized detachment of the adhered canvases as well as widespread lifting of the paint layer. Surface deposits of dust and grime had accumulated across the decorative cycle, compromising legibility and altering the material surface.

Prior to any intervention on the paintings, remediation of the building’s masonry was undertaken to address the source of moisture infiltration. The conservation treatment included the consolidation of lifting paint layers, stabilization of detached canvas sections and plasters, controlled surface cleaning, filling of losses and chromatic reintegration.

The project ensured both the structural solidity and renewed accessibility of the church’s painted decoration within its demanding tropical environment.