Johannes de Sacrobosco, also written Ioannes de Sacro Bosco, later called John of Holywood or John of Holybush (c. 1195 – c. 1256), was a scholar, Catholic...

de sphaera, Textus de sphaera, or simply De sphaera) is a medieval introduction to the basic elements of astronomy written by Johannes de Sacrobosco (John...

Sacrobosco is an irregular lunar impact crater that is located in the rugged southern highlands to the west of the Rupes Altai escarpment. It is a readily...

Caesar's July, but this is an invention of the 13th century scholar Johannes de Sacrobosco. Sextilis had 31 days before it was renamed. It was not chosen for...

appears in some reform calendars. The thirteenth-century scholar Johannes de Sacrobosco claimed that in the Julian calendar, February had 30 days in leap...

1180–84 Tractatus de Sphaera, or De sphaera mundi, the basic elements of astronomy written by Johannes de Sacrobosco c. 1230 Tractatus de superstitionibus...

Caesar's July, but this is an invention of the 13th-century scholar Johannes de Sacrobosco. Sextilis in fact had 31 days before it was renamed, and it was...

of a small paper boat in an edition of Tractatus de sphaera mundi from 1490 by Johannes de Sacrobosco. However it is very likely that paper folding originated...

He is known as the author of a 1271 commentary on the De Sphera Mundi of Johannes de Sacrobosco. It includes a significant reference to the state of the...

used in Eastern Orthodoxy Precursors of the Gregorian reform Johannes de Sacrobosco, De Anni Ratione ("On reckoning the years"), c. 1235 Roger Bacon,...