JOHANNES DE [Joni.' IIOLYWOOD] SACRO BOSCO (d. 1244 or 1256)  , astronomical author, studied at See also:

• OXFORD
• OXFORD, EARLS OF
• OXFORD, EDWARD DE VERE, 17TH EARL
• OXFORD, JOHN DE VERE, 13TH EARL OF (1443-1513)
• OXFORD, PROVISIONS OF
• OXFORD, ROBERT DE VERE, 9TH EARL OF (1362-1392)
• OXFORD, ROBERT HARLEY, 1ST

Oxford and was afterwards See also:

• PROFESSOR (the Latin noun formed from the verb profiteri, to declare publicly, to acknowledge, profess)

professor of See also:

• MATHEMATICS (Gr. /saBnµar1Kil, Sc. vOcvn or E7rlQTt'µn; from p iN.La, "learning" or "science ")

mathematics at the university of See also:

• PARIS
• PARIS (also called ALEXANDROS)
• PARIS, ALEXIS PAULIN (1800-x881)
• PARIS, BRUNO PAULIN GASTON (1839-1903)
• PARIS, FRANCOIS DE (169o-1727)
• PARIS, LOUIS PHILIPPE ALBERT
• PARIS, TREATIES OF (1814-1815)

Paris . He wrote a See also:

• TREATISE

treatise on spherical See also:

• ASTRONOMY (from Gr. &arpov, a star, and v ,usiv, to classify or arrange)

astronomy, Tractatus de sphaera, first printed at See also:

• FERRARA

Ferrara in 1472 . This was the second astronomical See also:

• WORK

work to be printed . Although recording no advance on the Arabian commentaries on See also:

• PTOLEMY (CLAUDIUS PTOLEMAEUS)

Ptolemy, it gained a See also:

• GREAT

great reputation; twenty-four See also:

• EDITIONS

editions appeared before 1500, and at least See also:

• FORTY

forty between 1 500 and 1647, in which See also:

• YEAR

year the last edition was published, at See also:

• LEIDEN

Leiden . About the year 1232 he wrote De anni ratione or De eomputo ecclesiastico (printed editions at Paris in 1538 (?), 1550, 1572 and at See also:

• ANTWERP
• ANTWERP (Fr. Anvers)

Antwerp in 1547 and 1566), in which he points out the increasing See also:

• ERROR (Lat. error, from errare, to wander, to err)

error of the See also:

• JULIAN (FLAVIUS CLAUDIUS JULIANUS) (331-363)

Julian See also:

• CALENDAR

calendar, and suggests a remedy which is nearly the same as that actually used under See also:

• GREGORY
• GREGORY (Gregorius)
• GREGORY (Grigorii) GRIGORIEVICH ORLOV, COUNT (1734-1783)
• GREGORY, EDWARD JOHN (1850-19o9)
• GREGORY, OLINTHUS GILBERT (1774—1841)
• GREGORY, ST (c. 213-C. 270)
• GREGORY, ST, OF NAZIANZUS (329–389)
• GREGORY, ST, OF NYSSA (c.331—c. 396)
• GREGORY, ST, OF TOURS (538-594)

Gregory XIII. three See also:

• HUNDRED

hundred and fifty years later . He also wrote Algorismus or De arte numerandi, printed in 1490 (?), in 1517 (See also:

• VIENNA (Ger. Wien; Lat. Vindobona)
• VIENNA, CONGRESS OF (1814-1815)

Vienna), 1521 (See also:

• CRACOW (Pol. Krakov; Ger. Krakau)

Cracow), 1523 (See also:

• VENICE
• VENICE (continued)
• VENICE (Venezia)

Venice) ; De astrolabio and Breviarum See also:

• JURIS

juris .