Gerhard from Sabbioneta

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Gerhard von Sabbioneta (also Gerardus de Sabioneta, Gerhardo da Sabbioneta, Sabbionetta and other forms) was an Italian astronomer and astrologer of the 13th century.

life and work

Gerhard von Sabbioneta came from Sabbioneta near Cremona and was often confused with Gerhard von Cremona . It is documented around 1255 and had a reputation as an important astrologer. He was also called a doctor.

He was, among others, Ferdinand Wüstenfeld , Girolamo Tiraboschi and Baldassare Boncompagni the Theorica planetarum attributed to a popular introduction to the theory of the planets in the Middle Ages, which dates from the 13th century. Olaf Pedersen , on the other hand, takes the view that it was written by an anonymous author in the middle of the 13th century. Although this work had a number of errors, it presented the main features of Ptolemaic theory briefly and concisely and was therefore the main textbook on this at universities for over 300 years with over 200 known manuscripts. Richard Lemay believes that an attribution to Gerhard von Cremona is possible, for example on the basis of a manuscript in Saint Petersburg that contains the work with manuscripts from the 12th century by Gerhard von Cremona and Johannes Hispalensis .

A Liber Geomantie (or Geomantia astronomica ), which is otherwise often attributed to Gerhard von Cremona, was also ascribed to Gerhard von Sabbioneta , but with weak arguments and, as with the Theorica planetarum, without support from medieval manuscripts.

It is possible that Gerhard von Sabbioneta was connected to the court of Friedrich II and possibly professor in Bologna around 1220 .

literature

Web links

Individual evidence

  1. Boncampagni (Atti Acad. Pontificia, Volume 4, 1851/52, pp. 458ff) states that a list of his consultations exists between 1256 and 1260, quoted from Haskins, Studies in the history of mediaeval science, Harvard UP 1924, p. 257
  2. Lemay, Article Gerard of Cremona, Dict. Sci. Biogr., P. 189
  3. Pedersen, A survey of the Almagest, Springer 2011, p. 18 with reference to Pedersen, The Theorica Planetarum-Literature of the Middle Ages, Classica et Mediaevalia, Volume 23, 1962, pp. 225–232
  4. Lemay, Dict. Sci. Biogr., Vol. 15, p. 189
  5. Lemay, Article Gerard of Cremona, Dict. Sci. Biogr., Volume 15, p. 186
  6. ^ Giancarlo Petrella, L'officina del geografo: la "Descrittione di tutta Italia" di Leandro Alberti .., Milan 2004, footnote 273, p. 269