Reconstruyendo la geografía ibérica del Calixtino: El Liber Sancti Iacobi del monasterio cisterciense de Santa María de Alcobaça (P-Ln Alc. 334/CCCII)

P-Ln Alcobaca 334/CCCII (c. 1175) is an outstanding example of a Portuguese manuscript from the Middle Ages. This is principally because it contains a formidable bibliographical corpus associated with the cults of Martin of Tours (ff. 1 r -103 v ) and St James the Greater (ff. 103 v -215 v ). Contrary to what might be expected, Alc. 334 has been little studied, and therefore still raises many questions: Where was it copied? In what circumstances did it arrive in Alcobaca? When did this happen? Focusing on its Jacobean content, what degree of affinity does it show with the Codex Calixtinus ? And what distinguishes it from the Compostellanus ? From a musicological perspective, Alc. 334 transmits the texts of two chants in honour of St James: the processional hymn Salve festa dies Iacobi and the conductus Ad honorem regis summi . Since the Codex Calixtinus incorporates a significantly higher number of musical pieces, what reasons could have lain behind such a restricted selection? What was its intention? This article aims to respond to these questions from a multidisciplinary approach encompassing fields of study such as historiography, liturgy, philology and palaeography, in addition to musicology, with the purpose of contributing to a better knowledge of the manuscript. Amongst its main conclusions, it will show the close link that joins Alc. 334 with the Legendarium de Sanctis per circulum anni (Alc. 418 to 422).