This article examines the Saturday Office of Our Lady in the liturgical uses of medieval Portugal through the analysis of manuscripts and early printed breviaries associated with Braga, Coimbra, Évora, and related sources. It reconstructs the structure, textual contents, and chant repertories of the surviving offices, including the expansion from a three- to a nine-lesson form, and situates selected textual and chant material within broader Iberian and European traditions. Particular attention is given to the use of patristic and homiletic texts as well as miracle narratives. Comparative analysis reveals complex patterns of internal and external borrowing and adaptation involving Marian feasts, the daily Hours of the Virgin, the ferial office, and regional liturgical traditions. The study argues that these offices emerged through intersecting processes of transmission that combined shared repertorial materials with distinct local configurations shaped by evolving liturgical and devotional contexts.
João Pedro d' Alvarenga (Tue,) studied this question.