by the Vincenzo Sulcis company between 1871 and 1872. The façade, set on a base of volcanic-stone ashlar, is divided horizontally by stringcourse cornices. The council meeting room was decorated during the 1920s in a design by Sardinian sculptor Francesco Ciusa and painter and illustrator Remo Branca. Artist Carmelo Floris created a triptych of panel paintings which decorates the rear walls. Sanctuary of Madonna delle Grazie The Sanctuary of Madonna delle Grazie dates to the 12th and 13th centuries, and was initially dedicated to the Cagliari martyr San Saturno. The communities which have altered the building can be seen in its façade. The oldest portion is in the centre. The church nave is divided into six bays by pointed trachyte arches supporting a wooden vault with exposed beams. Openings in the thick outer walls simulate chapels. Two chapels are on the sides of the presbytery: one dedicated to the Sacred Heart of Jesus and the other to Saint Francis. Mining Art Museum The museum was conceived in 1998 by a group of mining men who wanted a tangible reminder of their origins so the history of their land would not be forgotten. Housed in the basement of the Giorgio Asproni Mining Institute, it displays scale model reproductions, newspaper articles about life in the mines and a collection of photographs. The museum also contains various machinery for excavation, drilling and transport and a reconstruction of a mechanical workshop with modern machinery. The tunnels underneath the building are reached by a ramp along a railway, along which elements of work in the mines have been reconstructed. Archive The archive preserves the history of Villa di Chiesa from the Catalan-Aragonese, Spanish and Savoy periods. The documents begin with Il Breve di Villa di Chiesa, a book of laws dating back to 1327. Written on parchment (possibly mutton), only a few pages are missing. Its text, in Gothic script, was written in the Pisan dialect. The book was the result of a process of legislative drafting which began during Donoratico rule and ended with Aragon dominion. The definitive version, in four books, dates back to the period of direct rule by Pisa. Porto Flavia The harbour has an important position in innovation and technology in Sardinian mining construction. The Belgian Vieille Montagne company appointed engineer Cesare Vecelli to conduct a planning study from 1922 to 1924 of reducing the cost of transporting ore from