Raw materials and technology of Medieval Glass from Venice: The Basilica of SS. Maria e Donato in Murano

• Rare dataset of medieval glass from Venice. Common technology based on use Levantine ash. Three sources, sand compositions. Possible origins in Italy, the Levant and Egypt. Assemblages Venice, leading glassmaking centre Europe, are rarely accessible for analysis. Here we present electron microprobe analyses sixty-one vessels dated to between 12th and15 th centuries island Murano, which late 13th century was production city. All appear have used same type soda ash, with similar levels soda, magnesia, potash phosphate this is likely originated Levant. The alumina, iron titanium contents suggest that three different silica sources been glass. Comparison available data Venice elsewhere northern Italy suggests assemblage may include material made island. Furthermore, there similarities Egypt raising possibility raw several regions be represented. However, records indicate imported as well Levant, remains a case.