Fig. 4From: Prestige markers in art: subtle stratagems in material selection for fifteenth-century stained-glass windowsOutline of the four panels showing the distribution of the compositional glass subgroups for K-rich glass (K1, K2, and K3), Ca-rich glass (Ca1 and Ca2) and industrial glass compositions in the four panels: a AV.1163, b AV.1164, c AV.1165, and d AV.1166Back to article page