Fig. 9From: The medieval bronze doors of San Zeno, Verona: combining material analyses and art historyPCA on the decorative frames and frequency distribution of the main alloying elements according to the workshop attribution: a Biplot of the ED-XRF measurements on frames (workshop A: 11 points; workshop B: 33 points; workshop B/C: 56 points): b Sn; c Zinc; d PbBack to article page