Trinity, historiated initial on a leaf from a Choirbook, in Latin [Italy (Pavia), c.1480-1500]

single leaf, 475x330mm, vellum, with an initial 'B', 115x120mm, for 'Benedicta sit sancta Trinitas', the Introit for Trinity Sunday, 7 lines of text and music on four-line red staves, 375x220mm, rastrum 27mm, red ink foliation 'CCXV' in upper margin, slight water damage at top, not affecting the initial, small pigment losses and rubbing 

The style of the illumination is characteristic for Pavia and closely related to the Choirbooks at the Cathedral, as suggested by Pier Luigi Mulas who published the work of the Master of the Graduals in San Salvatore in Pavia (P.L. Mulas, 'Le Maître des Graduels de San Salvatore de Pavie’, in Quand la peinture était dans les livres, 2007, pp.223-33). The three-headed Trinity has visual precedents not only in Christian but also in Pagan works of art.