Manuscript ALC-34 in the Biblioteca Nacional de Portugal de Lisboa (Lisbon) is a collection of theological texts from the cistercian abbey of Alcobaça. (Originally shelfmark CCXXXVIII in the abbey library.)

At the back of the volume was a parchment folio with musical notation, dating from the end of the 13th century or beginning of the 14th, which had been repurposed as a combination of flyleaf and pastedown. It has since been removed from this context and is preserved by the library separately as ALC-34/1.

This fragment contains three two-part motets from the Ars Antiqua repertory, all of which can be found nearby one another in the Medici Antiphoner (F), and one of which can be found in the Las Huelgas and Madrid codices.

The current recto (corresponding to the recto side of its use as a flyleaf) was the original verso, and vice-versa (the motet Alta bovi et leoni aquile begins on the current verso and continues to the current recto). Both sides were evidently ruled with six red 5-line staves (there is no gap in the text and music for the above motet), the topmost of which has been cropped, along with the original outside margin.

Le manuscrit ALC-34 de la Biblioteca Nacional de Portugal de Lisboa (Lisbonne) est un mélange de textes théologiques provenant de l'abbaye cistercienne d'Alcobaça (Cote ancienne de l'abbaye : CCXXXVIII)

A la fin du recueil se trouve un fragment composé de deux morceaux de folio dont un est collé au contre-plat.

Ce fragment, fin XIIIème début XIVème siècle, contient des motets du répertoire dit de l'Ars antiqua et tous se retrouvent dans le manuscrit de Florence et l'un d'entre eux se retrouve aussi dans le Codex Las Huelgas et dans Madrid (E-Mn Ms/20486).

garde inf. verso:
Doceas hac die - fin du motet, on voit seulement le texte "[m]e qui docebit".
concordance : I-Fl Plut. 29.1, fol. 400r-v

Alta bovi et leoni aquile - Suite du motet au Contre-plat inf. et au folii de garde inf. recto
concordances : E-BUlh s/n (Codex Las Huelgas), fol 84v—85v
E-Mn 20486, fol 131v
I-Fl MS Pluteus 29.1, fol 407-407v

garde inf. recto:
Et exaltavi magna cor [/ Et exalta]
Concordance : I-Fl Plut. 29.1, fol. 405v-406

six staves per page, ruled in red ink.

Notified by Dominique Gatté, 2019