Drawing of a quadrant, illustrating Robertus Anglicus' Tractatus quadrantis veteris. Image taken from f. 65v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" ref More
Detail of a diagram showing the phases of the moon, illustrating Johannes de Sacro Bosco's Computus. Image taken from f. 38v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley More
Detail of a decorated initial 'I'(ntencio) at the beginning of Robert Grosseteste's De sphaera. Image taken from f. 74 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manus More
Text page with calendrical tables illustrating Robert Grosseteste's Computus correctorius. Image taken from f. 93 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript More
Table in Robertus Anglicus' Tractatus quadrantis veteris. Image taken from f. 70v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers to a collection of medi More
Illuminated initial 'D'(icto) in Robertus Anglicus' Tractatus quadrantis veteris. Image taken from f. 66v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers More
Detail of a calendarial table in a treatise attributed to Robert Grosseteste 'Lincolniensis'. Image taken from f. 13v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manusc More
Puzzle initial 'M'(inuciaru[m]) with pen-flourishing developing into a 'J-border', at the beginning of a treatise on vulgar fractions attributed to Johannes Anglicus. Image taken from f. 59 of Various calendari More
August in a calendarial table, in a treatise attributed to Robert Grosseteste 'Lincolniensis': Image taken from f. 10 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manusc More
Diagram illustrating Johannes de Sacro Bosco's Tractatus de sphaera. Image taken from f. 23 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers to a collecti More
Drawings and diagrams at the end of Robertus Anglicus' Tractatus quadrantis veteris. Image taken from f. 70 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refe More
Drawings and diagrams illustrating Robertus Anglicus' Tractatus quadrantis veteris. Added drawing of tower in the margin (?15th century). Image taken from f. 68 of Various calendarial and computistical treatise More
Detail of diagrams with the movements of the sun around the earth, illustrating Johannes de Sacro Bosco's Tractatus de sphaera. The cities of Rome and Paris are depicted in the diagram on the right. Image taken More
Illuminated initial 'A'(d) at the beginning of a calendarial treatise attributed to Robert Grosseteste 'Lincolniensis'. Image taken from f. 6 of Various calendarial and computistical treatises. Written in Latin More
Detail of circular diagram with a man at its centre, illustrating Johannes de Sacro Bosco's Computus. Image taken from f. 36v of Various calendarial and computistical treatises. Written in Latin. The "BL Harle More
Detail of an astronomical diagram illustrating Robert Grosseteste's De sphaera. Image taken from f. 74 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers to More
January in a calendarial table, in a treatise attributed to Robert Grosseteste 'Lincolniensis': Image taken from f. 6v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manus More
Detail of a decorated initial 'O'(mnia) at the beginning of Johannes de Sacro Bosco's Algorismus. Image taken from f. 50v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Ma More
Calendarial table in a treatise attributed to Robert Grosseteste 'Lincolniensis'. Image taken from f. 14 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers More
Detail of an astronomical diagram showing an eclipse of the moon, illustrating Robert Grosseteste's De sphaera. Image taken from f. 81v of Various calendarial and computistical treatises. Written in Latin. The More
Detail of circular diagram, illustrating Johannes de Sacro Bosco's Computus. Image taken from f. 46v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers to a More
Calendarial table in a treatise attributed to Robert Grosseteste 'Lincolniensis'. Image taken from f. 13v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers More
Added notes on mathenatical matters. Image taken from f. 58v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers to a collection of medieval manuscripts held More
Detail of an illuminated initial 'T'(ractatus) at the beginning of Johannes de Sacro Bosco's Tractatus de sphaera. Image taken from f. 17 of Various calendarial and computistical treatises. Written in Latin. T More
Statement as to the time of the vernal equinox in the year 1293. Image taken from f. 73 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers to a collection o More
Table concerning the zodiac signs and movements of the moon in a treatise attributed to Robert Grosseteste 'Lincolniensis'. Image taken from f. 15v of Various calendarial and computistical treatises. Written in More
Paschal table. Image taken from f. 14v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers to a collection of medieval manuscripts held in the British Librar More
Detail of a decorated initial 'C'(ompotus) at the beginning of Johannes de Sacro Bosco's Computus. Image taken from f. 27v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley M More
Detail of an illuminated initial 'G'(eometrie), at the beginning of Robertus Anglicus' Tractatus quadrantis veteris. Image taken from f. 64 of Various calendarial and computistical treatises. Written in Latin. More
Detail of an illuminated initial 'A'(d) at the beginning of a calendarial treatise attributed to Robert Grosseteste 'Lincolniensis'. Image taken from f. 6 of Various calendarial and computistical treatises. Wri More
Illuminated initial 'T'(ractatus) at the beginning of Johannes de Sacro Bosco's Tractatus de sphaera. Diagram of the heavenly spheres. Image taken from f. 17 of Various calendarial and computistical treatises. More
Detail of a puzzle initial 'M'(inuciaru[m]) with pen-flourishing developing into a 'J-border', at the beginning of a treatise on vulgar fractions attributed to Robertus Anglicus. Image taken from f. 59 of Vario More
Detail of an astronomical diagram showing an eclipse of the sun, illustrating Robert Grosseteste's De sphaera. Image taken from f. 82 of Various calendarial and computistical treatises. Written in Latin. The " More
Detail of a drawing with a serpent biting its tail, illustrating Johannes de Sacro Bosco's Computus. Image taken from f. 32v of Various calendarial and computistical treatises. Written in Latin. The "BL Harley More
Detail of diagrams showing eclipses of the sun and moon, illustrating Johannes de Sacro Bosco's Tractatus de sphaera. Image taken from f. 27 of Various calendarial and computistical treatises. Written in Latin. More
Detail of a zodiacal diagram, illustrating Johannes de Sacro Bosco's Computus. Image taken from f. 30 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript" refers to More
Drawing of a mnemonic hand in a treatise attributed to Robert Grosseteste 'Lincolniensis'. Image taken from f. 13 of Various calendarial and computistical treatises. Written in Latin. The "BL Harley Manuscript More