A review of mid-Medieval glass from northern and central Italy: the analytical approach

A review of analytical data obtained on mid-Medieval glass from various sites of northern and central Italy is here discussed, in order to provide further insights into the complexities of the glass industry in mid-Medieval times, perceived to be a period of technological transition, within a well-defined geographical context. This aim was performed by means of comparisons, using statistical multivariate methods, with major natron and soda plant ash reference groups.