In Monteroni d'Arbia, in the province of Siena, stands the Church of Santi Giusto e Donato, erected in 2000 and commissed by the Archiepiscopal Curia in Siena. The structure, with an irregular plan, has a slightly rounded shape, a symbol of its capacity and ease. The materials used are lamellar wood and prestressed white cement blocks, which give the building a rural aesthetic.