The building, housing the management of Afundación, was designed in 1879 by the architect Jenaro de la Fuente Domínguez. In an eclectic style, it showcases expert stone craftsmanship and features two facades connected by a chamfer, highlighted with cast iron bay windows. Spanning over 13,000 square meters across five floors, it houses an auditorium, a garden/salon, a conference room, and a meeting room.