It is on the north limit of the industrial Park Toluca 2000, on the bank of the Lerma River where the Landsteiner Pharmaceutical Industry took the opportunity to develop its Campus. The main challenge came from the necessity to combine several diverse functions in a relatively limited place. 4 units share out the 9,970 m2 of the site, each one hosting a specific activity of the pharmaceutical group: two laboratories of production, a distribution center and corporative offices. The diagram of the flow of persons and materials, and specially the entrance and exit of goods around the production center, defined the plan of the project. The line traced by the river rules the project. It is emphasized by a filter of planted trees, which dialogues with the direct natural surroundings, generating an ecosystem inside of the industrial complex. A series of parallel lines generate the flow of circulations, their connections articulate and define the volumes of the buildings. Into the same formal vocabulary, each building develops its own personality through a delicate work on the scale, color and material. The main volumes are interconnected through the light structure of an extensive green roof, which links up every access of the complex with gardened areas. Between the blocks, this green pedestrian area optimizes the microclimate of the building and offers the employees a relaxing surrounding. This green articulation provides softness and freshness into the rigidity that requires such program through its function and scale.