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<p>The object of this study is a medal of King Alfonso XI or a replica of the imprint obtained in a royal document with the distinctive signs of a physical or legal person to attest to the will of its possessor to intervene. Alfonso XI of Castile, called “Alfonso XI The Justicier” (Salamanca, August 13, 1311–Gibraltar, March 26, 1350), was King of Castile, great-grandson of Alfonso X “the Wise.” In a collaborative work between institutions, the piece was ceded for study and belongs to the Museum of the Fort of San Carlos, province of Mendoza, Argentina. It is important to mention in this regard that the aforementioned museum does not have data on the origin of the piece and the only thing known from the archives is that it was a donation (anonymous). This is a circular piece of practically pure copper with the figure of King Alfonso XI in a battle stance in relief on the obverse, while on the reverse, it features castles and lions distributed in four quartiles also in relief. Chemical composition studies revealed that it is a quaternary bronze alloyed with lead (Cu-Sn-Zn-Pb), and metallographic studies carried out on its edge to observe its internal structure and metallographic replicas in acetate indicated a plastic deformation structure that reveals some of the manufacturing processes involved.</p>

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Copper Medal or Replica of a Biphasic Seal of King Alfonso XI of Castile and Leon: Characterization and Archaeometallurgical Study

  • 期刊论文

  • 发表日期：

    2025年7月28日

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  • Patricia Silvana Carrizo

摘要

The object of this study is a medal of King Alfonso XI or a replica of the imprint obtained in a royal document with the distinctive signs of a physical or legal person to attest to the will of its possessor to intervene. Alfonso XI of Castile, called “Alfonso XI The Justicier” (Salamanca, August 13, 1311–Gibraltar, March 26, 1350), was King of Castile, great-grandson of Alfonso X “the Wise.” In a collaborative work between institutions, the piece was ceded for study and belongs to the Museum of the Fort of San Carlos, province of Mendoza, Argentina. It is important to mention in this regard that the aforementioned museum does not have data on the origin of the piece and the only thing known from the archives is that it was a donation (anonymous). This is a circular piece of practically pure copper with the figure of King Alfonso XI in a battle stance in relief on the obverse, while on the reverse, it features castles and lions distributed in four quartiles also in relief. Chemical composition studies revealed that it is a quaternary bronze alloyed with lead (Cu-Sn-Zn-Pb), and metallographic studies carried out on its edge to observe its internal structure and metallographic replicas in acetate indicated a plastic deformation structure that reveals some of the manufacturing processes involved.