Centre de tri postal, dit la Poste rouge, actuellement immeuble de bureaux

The former postal sorting center, known as La Poste Rouge, is located on the left bank of the River, positioned between the train station and the railway bridge, seamlessly adapting to the topography. Constructed in 1950, the building exemplifies the modernist architectural style of the interwar period and is part of the post-war reconstruction efforts in Châlons-en-Champagne, which typically employed brick as a primary material. Today, it functions as an office building.