The Scientia artis musice, a music theory treatise completed in the year 1274 by Hélie Salomon, a cleric from the village of St-Astier (Périgord/Dordogne), covers all the usual topics treated in such sources: letter names, hexachord syllables, the claves (letter + syllable(s)), the musical hand, mutation, staff notation, clef placement and chant genres. It includes an incomplete tonary with representative chant genres together with a commentary on the seculorum (differentiae) appropriate to various chant incipits. A lengthy instruction on the performance of parallel four-voice organum is also included. The Scientia is the only medieval theory treatise whose eight illustrations (called ‘figurae’) include human figures. These images relate directly to matters covered in the treatise and serve to make its main points more easily committed to memory. Of especial interest is the image of an enthroned bishop that serves as the focal point for a novel exposition of the tonal system of chant as (1) a set of logical relations modelled after the Tree of Porphyry and (2) a variant of the tree of consanguinity. Since the sole surviving copy of the treatise is the original, all these details must reflect the author's intention.

Who was Jean de Savoie, the clerk with whom the composers Jean Campion and Philippe de Vitry penned the jeu-parti Ulixea fulgens in 1350? This article uses Jean's hitherto unnoticed will and foundations at the church of Saint-Benoît-le-Bestourné, Paris, with other documentation, to bring together Jean's two identities in a unified biography (including a new date for his death, in 1354); to illustrate the close parallels between his own career and that of Philippe de Vitry, and to map the scope of opportunities for contact between them in and around the French royal court from the early 1320s onwards. Jean was also an artist and illustrator, and his career as one of the more prominent cartoonists of Philippe VI, king of France, throws light on potential contact with Vitry via the adoption by Louis I de Bourbon of the hitherto largely royal practice of charter illustration. In addition the properties acquired to support two chaplaincies endowed by Jean at Saint-Benoît demonstrate the extent to which he was professionally embedded in a network of royal councillors working in and around the Parlement in the 1330–50s, in which Vitry was also active. Also identified is a house acquired at Saint-Benoît by Gervès du Bus, author of the Roman de Fauvel.

In 1409 Ludovico Barbo arrived at the monastery of Santa Giustina in Padua, intent on its reformation. Since the late fourteenth century, the scriptorium at Santa Giustina had produced some of the most significant collections of polyphonic music to survive from the period, specialising in copying the avant-garde repertories of the Ars nova. Yet the reforms Barbo sought to introduce – reforms based on ideals he and a cohort of Venetians had been living out on the island of S. Giorgio in Alga – eschewed outward ostentation, and centred on prayerful engagement with the scene of Christ's Passion. Barbo's initiatives would seem at odds with the tradition of secular polyphony cultivated at the monastery in the years before his arrival. Official documents from the reform prohibit the practice of cantus figuratus and paint a picture of a uniformly spare music aesthetic.

Manuscript and material evidence from Santa Giustina and dependent houses tells a different story, and suggests that communities found use for the monastery's musical past within the reformed practice of prayer and meditation. Vestiges of this past appear in the most unlikely of places: the Good Friday rituals that Barbo himself worked to strip of polyphonic accoutrement. The efforts of individual monks, musicians and scribes – here Rolando da Casale, whose musical expertise Barbo enlisted in the copying of new liturgical manuscripts, and Johannes Preottonus – emerge as telling examples of the ways in which institutional histories come under the pressure of their individual actors.