Medieval pavements composed of lead-glazed tiles decorated with a variety of techniques continue to inspire questions about the organisation of glaze manufacture, and the supply and origin of lead materials. The tiles analysed in this study are from Suscinio I (a 13th-century pavement) and Suscinio II (a 14th-century pavement), at the Château of Suscinio in Brittany, and also from the 14th-century pavement at the fortified manor house in Brain-sur-Allonnes, Anjou. Lead isotope analysis (LIA) was used to examine samples from 44 lead-glazed tiles, 29 of which are transparent, while 15 are tin-opacified (an exogenous technique in these regions during this period). Five out of the six LIA groups thus identified favour site-specific supply networks, while results for the remaining group, LIA5, indicate a multi-site supply network. After combining LIA results with archaeological and historical data, the most likely provenance for the lead materials in LIA5 is Derbyshire, in the British Isles. Both the importation of ready-to-use glazing mixtures and the use of lead from neighbouring mines can now therefore be discounted as plausible hypotheses for the production of the tin-opacified lead-glaze tiles analysed in this study.

由装饰有各种技术的铅釉瓷砖组成的中世纪路面继续激发有关釉料制造组织以及铅材料供应和来源的问题。本研究中分析的瓷砖来自 Suscinio  I（13 世纪的人行道）和 Suscinio II（14 世纪的人行道），位于布列塔尼的 Suscinio 城堡，以及位于安茹布伦阿隆河畔布赖恩的强化庄园的 14 世纪人行道。铅同位素分析 (LIA) 用于检查来自 44 块铅釉瓷砖的样品，其中 29 块是透明的，而 15 块是不透明的锡（这一时期这些地区的外源技术）。因此确定的六个 LIA 组中有五个喜欢特定站点的供应网络，而其余组 LIA5 的结果表明多站点供应网络。在将 LIA 结果与考古和历史数据相结合后，LIA5 中铅材料的最可能出处是不列颠群岛的德比郡。