The commission for a new headquarters and pharmaceutical laboratory came to Breuer’s Paris office through the architect Jack Freidin. Mortimer Sackler, an American physician and entrepreneur who made his fortune in the pharmaceutical industry, had recently purchased a French affiliate and needed an architect with experience building in France. Breuer and his associate Robert Gatje separated the functions into offset volumes, connecting the curved administration building to the rectangular manufacturing and laboratory building with a narrow, angled bridge. The three-story administration building of modular concrete window panels was raised on faceted pilotis. Employees accessed their offices from a central corridor. Its curved form was related to Breuer’s contemporaneous design for the Department of Housing and Urban Development. The much larger two-story laboratory building also featured facades of modular concrete panels. Breuer’s office designed the first of two expansions between 1970 and 1972. His successor firm, MBA, built a second expansion after Breuer’s retirement in 1976. Breuer also designed the Mundipharma headquarters and manufacturing plant for Sackler in 1974.