I Workshop on Heritage Stones Salamanca (Spain) 2-4 October 2018
stone of the upper part of the Loggia come from the Monteripaldi quarry, even though this quarry was opened at the end of the 15th century and the period of construction of the Loggia was the 14th century. This can be explained by the fact that the upper part of the building, being more exposed to atmospheric agents, is the one that has deteriorated more rapidly and thus has undergone periodic substitutions with material deriving from the Monteripaldi quarry. Extensive substitutions with material from this quarry have also been found in the pilasters facing the Uffizi Museum (Banchelli et al., 1997). Taking into account what previously exposed, it is clear that Pietraforte is a very important stone material for Florence. It is a relatively durable material but yet subjected to deterioration and in some cases, when the restoration intervention would be not effective, it is necessary to replace it.
References ABBATE E., BRUNI P., 1987, Modino-Cervarola. Torbiditi oligo-mioceniche ed evoluzione del margine nord appenninico. Mem. Soc. Geol. It. 39, 19-33. BANCHELLI A., FRATINI F., GERMANI M., MALESANI P., MANGANELLI DEL FA’ C., 1997, The sandstones of Florentine hystoric buildings: individuation of the marker and determination of the supply quarries of the rocks used in some Florentine monuments�. Science and Technology for Cultural Heritage, 6 (I), 1997, 13-22. BORTOLOTTI, V., 1962, Contributo alla conoscenza della Serie Pietraforte-Alberese. Boll. Soc. Geol. It., v. 81, no. 2, 225-304. BRUNI, P., CIPRIANI, N., AND PANDELI, E., 1994, New sedimentological and petrographical data on the Oligo-Miocene turbidite formation of the Tuscan domain. Mem. Soc. Geol. It., v. 48, 251-260. CIPRIANI C., MALESANI P., 1966, Ricerche sulle arenarie: 13) La Pietraforte. Boll. Soc. Geol. It., v.85, no. 2, 299-332. MALESANI P., PECCHIONI E., CANTISANI E., FRATINI F., 2003, Geolithology and provenance of the materials of the some historical buildings and monuments of Florence centre (Italy). Episodes, Vol. 26, n. 3, 2003, 250-255. RICCI LUCCHI F., 1970, Sedimentologia. Atlante fotografico delle strutture primarie dei Sedimenti. Zanichelli Editore, Bologna, 1970 Keywords: Pietraforte, characterization, decay, substitution.
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