Opus signinum ('cocciopesto' in modern Italian) is a building material used in ancient Rome. It is a form of Roman concrete (opus caementicium), the main difference being the addition of small pieces of broken pot, including amphorae, tiles or brick, instead of other aggregates.Signīnum Opus. Harry Thurston Peck, Harpers Dictionary of Classical Antiquities (1898). Its main advantage over opus caementicium was that it is waterproof, the reason for its widespread use in Roman baths, aqueducts, cisterns and any buildings involving water. In floors it provided damp-proofing.
Pliny the Elder describes its manufacture:. Latin text : Plini Secundi Naturalis historiae libri XXXVII, Karl Friedrich Theodor Mayhoff, Leipsig, Teubner 1906.
Pliny's use of the term signine references Signia (modern Segni), the town in Latium which was famous for its tiles."Opus signium" , Oxford Dictionary
Origins, spread, disuse
The technique, most probably invented by the Phoenicians, is documented in the early 7th cent. BC at Tell el-Burak (Lebanon),Adriano Orsingher et al., Phoenician lime for Phoenician wine: Iron Age plaster from a wine press at Tell el-Burak, Lebanon. In: Antiquity Band 94, Nr. 377; S. 1224-1244. then in Phoenician colonies in North Africa, some time before 256 BC, and spread north from there to Sicily and finally to the Italian peninsula.The Decorated Pavements of Morgantina II: The Opus Signinum. Author(s): Barbara Tsakirgis. American Journal of Archaeology, Vol. 94, No. 3 (Jul., 1990), pp. 425-443. Archaeological Institute of America. The houses at Kerkouane on Cap Bon in Tunisia have opus signinum floors. The floors must date before 256 B.C., since the town was destroyed in that year by Regulus. Kerkouane I 79. H. Joyce, "Form, Function and Technique in the Pavements of Delos and Pompeii," AJA 83 (1979) 259. Floors of signinum are found extensively in the Punic towns of North Africa and commonly in the Hellenistic houses on Sicily.For the signinum in the North African houses, see D. Harden, The Phoenicians (London 1962) 133-34; T. Carter, "Western Phoenicians at Lepcis Magna," AJA 69 (1965) 128, pl. 33; M. Fantar, "Pavimenta Punica et signe dit de Tanit dans les habitations de Kerkouane," Studi Magrebini 1 (1966) 57-65; M. Fantar, "Les Pavements puniques," Les Dossiers de l'Archeologie (1978) 6-11; Kerkouane I 502-503; Kerkouane II; S. Lancel, "Les Pavimenta Punica du quartier punique tardif de la colline de Byrsa," Cahiers des etudes anciennes 17 (1985) 157-77. For the signinum floors in Sicilian houses, see for Agrigento: R.P. Jones and E.A. Gardner, JHS 26 (1906) 207-12; E. Gabrici, NSc 1925, 425-37; for Avola: M.T. Currò, BdA 51 (1966) 94; for Gela: D. Adames- teanu, NSc 1956, 346; for Heraclea Minoa: E. De Miro, Kokalos 12 (1966) 227; for Monte Iato: H.P. Isler, AntK 26 (1983) 39; for Solunto: M. deVos, BABESCH 50 (1975) 195- 224; for Syracuse: G. Gentili, NSc 1951, 156-57, NSc 1957, 282, 292; for Tindari: L. Bernabò Brea, BdA 50 (1965) 207. While some signinum pavements have been found in Rome, the technique is not common there.M.L. Morricone Matini. Mosaici antichi in Italia: Pavimenti di signino repubblicani di Roma e dintorni (Rome 1971). Vitruvius describes the process of laying a floor, whether signinum or mosaic.Marcus Vitruvius Pollio: de Architectura, Book VII The trend began in the 1st century BC, proliferating in private homes as well as public buildings.F. Sear. Roman Wall and Vault Mosaics. Heidelberg 1977 By the 2nd century, opus signinum would give way to more patterned styles of pavement.
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