The new wing of the Photography Museum in Charleroi is located in the old orchard of the former Carmelite convent, where the Museum has thrived since its creation in 1987. The half wood, half concrete structure works as a concatenation of volumes and spaces, each volume functioning as both a room with a particular function and an antechamber to the following spaces.For 6 months, the architects and the museum director defined the program, guided by the formula 1+1=1: both buildings serve as one museum, the new one becoming the interface between the convent and its park.During the programming phase, the needed new functions were distributed between the two buildings. Like a game of dominoes, as rooms in the convent were stripped of their functions, new ones took their place. Now, The old building shows the collection in chronological order, while the new wing uses each room to showcase a theme with photographs from the past 30 years.Contrasting with the dark bricks of the Carmelite convent, the new wing is covered with a luminous skin conceived in collaboration with the artist Jeanine Cohen. The panelling is made of anodized aluminium profiles, inside of which coloured panes subtly enliven the façade, changing with the light and the time of the day.