The fresco mural, made between 1943 and 1946 by the prominent artist Gregorio de la Fuente, was declared a Historical Monument in 2009. Originally, it decorated the room that gave access to the platforms for first class passengers of the State Railway system. Today, it is part of the Plenary Hall of the Regional Government building, located in the civic neighbourhood of Concepción. Kalam’s team of specialists in charge of the conservation work, is composed of mural restorers, a chemist specialised in nano-consolidation, an art historian and a documentalist. The intervention includes, dry cleaning using controlled compressed air with medical bulbs, followed by desalination and consolidation of the painting surface with the Ferroni-Dini method and the use of nanolime spray; biodeterioration treatment, filling and levelling of losses. The chromatic reintegration, using the tratteggio technique, culminates a full recovery of the work.