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The oldest documents revealing the spread of chess in medieval Christian Europe come from the Catalan counties and the Eastern Pyrenees. The aim of this paper is to add two new documentary evidences which confirm the presence of rock crystal chess pieces both in the abbey of Santa Maria de Ripoll and in the cathedral of Roda de Isabena. Additionally, the present study tries to reexamine our current knowledge regarding the exceptional set of pieces coming from the collegiate church of Sant Pere in Ager, suggesting it may have been a donation from one of the descendants of Arnau Mir de Tost, who were the viscounts of Ager of the Cabrera family and later became counts of Urgell.

espacio, tiempo y forma. serie vii, historia del arte

Nuevos datos sobre la temprana difusión del ajedrez en los Pirineos, y una reflexión sobre las piezas de Àger = New evidences on the early spread of chess in the Pyrenees, and a consideration about the Àger set.