Maison de la Mutualité

The Maison de la Mutualité sits on a foundation that required an unusual feat of engineering for its time. Because the building rests directly above the underground path of the Bièvre River, workers had to sink twelve hundred concrete piles deep into the soil to ensure the structure remained stable. Inaugurated in nineteen thirty-one, the building was designed by architects Victor Lesage and Charles Mitgen to serve as the headquarters for the Mutualist Federation of the Seine, an organization dedicated to providing social and medical support to its members.