[LIGHTING] Watermarked initials. Music notated Leaflet from a Tempera missal , gouache and ink on parchment. Italy, circa 1450-1475. Dimensions: H. 350 x L. 245 mmThis sheet is certainly taken from a missal . It includes the Sanctus (recto), a song of acclamation and praise to the glory of God (Te Deum). It is recited or sung during Mass, between the Preface and the Eucharistic Prayer, but also part of the Gloria (verso). Text: In Latin, Gothic liturgical writing. Square musical notation on staves of four lines drawn in red; initials painted in red or blue with red or blue filigree decoration. On the front, "Sanctus. Sanctus. Sanctus. Dominus Deus sabaoth pleni su[n]t c[a]eli et terra gloria tua osanna in excelsis. Benedictus qui venit in nomine domini osanna in excelsis. Agnus dei, qui tollis peccata mundi misere"; on the reverse "[...] nobis. Qui tollis peccata mundi suscipe deprecationem nostram. Qui sedes ad dextera [m] patris miserere nobis. Quonia tu solus s[an]c[tu]s. Tu solus dominus. Tu solus altissim[us] [Ihesu] [Christe]. Cum s[an]c[t]o spiritu in gloria dei patris. Amen. Condition: several holes in the parchment, sometimes damaging to the text, folds. Good general condition. Ancient analysis on the back.