Kalendarium. Tabula Gerlandi. Compotus Balduini. Algorismus. Liber de spera Iohannis de Sacrobosco et Compotus eiusdem. Compositio quadrantis et vsus eius. Theorica planetarum. De motu octaue spere. Et tabula de motu accessus et recessus [titel fenestra]

Manuscript 522, dating from the fourteenth century, is a composite manuscript. It was owned by Ter Doest Abbey. The manuscript contains didactic and theoretical treatises on celestial bodies. The document is richly illustrated technical illustrations: tables, geometric figures, drawings of instruments. It contains three treatises by Johannes de Sacrobosco (d. 1256): De sphaera, Computus Ecclesiast…