Pluteo 29.1

File:Pluteous 29.1, folio 1v.jpg, illustrated. Folio 1v from Pluteus 29.1]]

Pluteo 29.1, also known as Pluteus 29.1, or simply the Florence Manuscript, is an illuminated manuscript in the Laurentian Library of Florence. Along with the Florence Manuscript, the Laurentian Library contains 11,000 other manuscripts.{{Cite web |last=Menna |first=Giulio |date=2017-02-24 |title=The digitized manuscripts of the Laurentian Library (Biblioteca Medicea Laurenziana) |url=https://blog.digitizedmedievalmanuscripts.org/laurentian-library-manuscripts/ |access-date=2024-10-08 |website=DMMapp Blog |language=en}}

The manuscript is believed to have been produced by the workshop of Johannes Grusch in Paris during the mid-thirteenth century, probably between 1245 and 1255.The School of Notre-Dame by Juan Carlos Asensio ([http://www.goldbergweb.com/en/magazine/essays/2003/09/16246_print.php], retrieved 2008-06-20) It contains the largest extant collection of music in the Notre-Dame style,Scholastic Imagery in The Florence Manuscript by George Catalano, Essays in Medieval Studies 7, p. 41-50 ([http://www.luc.edu/publications/medieval/vol7/catalano.html], retrieved 2008-06-20). mainly organa, conductus, and motets. This is the most complete source for the music of the Notre Dame school.{{Cite web |title=I-Fl MS Pluteus 29.1 (Medici Antiphoner, ('F')) - DIAMM |url=https://www.diamm.ac.uk/sources/924/#/ |access-date=2024-10-24 |website=www.diamm.ac.uk}} The illumination consists of thirteen historiated initials and one full-page miniature which serves as its frontispiece.

The manuscript was issued in facsimile by Institute of Medieval Music in 1967.

File:Nusmido - folio 150 verso of Pluteo 29.1 in the Laurentian Library in Florence.jpg|Folio 150 verso of Pluteo 29.1, showing the clausula "Nusmido," the earliest known example of retrograde in music