Sklářský výrobní okruh z 2. poloviny 13. století u Jilmové v Krušných horách Přínos analytických metod pro poznání technologie výroby středověkého skla v Čechách / The glass production area near Jilmová in the Ore Mountains from the second half of the 13th century The contribution of analytical methods for studying glass production technology in medieval Bohemia

Abstract

The study contains the latest knowledge concerning glass production at the beginning of the High Middle Ages in one of the oldest glass production areas in the Ore Mountains consisting of three glassworks located in the upper reaches of the mountains. The work presents archaeological sources obtained in excavations at the Jilmová I, II and III sites, with attention being focused on finds specific to glass production centres, i.e., mainly fragments of technical ceramics – melting pots, crucibles and the waste accompanying various stages of glass production. The classic typological­morphological analysis is accompanied by a detailed archaeometric analysis. The results of spectrometric analyses (XRF, XRD, SEM–EDS and LA–ICP–MS) expand the informative value of archaeological finds and help refine existing knowledge of glass production technology in the second half of the 13th century.

Chemical composition of early modern and modern window glass from archaeological excavations in Prague‐Hradčany, Czech Republic

“…Window glass of a similar composition (with about 50% SiO 2 and high contents of K 2 O and CaO) was found in the church of St. Wenceslas, mostly likely dating to the 13th–14th centuries (Opava; Vad'urová, 2020). A similar typological composition of 52 wt% SiO 2 , 18.1 wt% K 2 O and 19.5 wt% CaO was identified in glasses from the archaeologically documented Jilmová glassworks dated to the second half of the 13th century (Černá et al, 2021). It is, therefore, clear that this type of glass was produced in the region of Bohemia.…”