Johannes Müller von Königsberg (1436-1476), better known as Regiomontanus, is widely considered as the most influential astronomer and mathematician of 15th-century Europe. He was active as an astrologer and deemed astrology to be the queen of mathematical sciences. Despite this, Regiomontanus's astrological activity has yet to be fully explored. A brief examination of Regiomontanus's manuscripts shows that his astrological interests were accompanied by interests in the arts and in methods of prognostication. This article studies an unconventional astrological-chiromantical text, whose relevance (...) is threefold: a) it sheds new light on Regiomontanus's astrological interests; b) it enriches our knowledge of Regiomontanus's efforts to learn and understand Greek-Regiomontanus transcribed it into his own manuscript during his sojourn in Italy from 1460-1467; and c) it is the sole extant text in the Greek tradition that provides a system for prognostication from the study of a person's hand, the parts of which are considered as being under the domain of planets. The article provides an English translation of Regiomontanus's transcription, alongside a brief commentary, and studies the intellectual and historical context of that production through manuscript analysis. (shrink)

Nel Marc. gr. Z. 333, testimone del testo astronomico intitolato Παράδοσις εἰς τοὺς περσικοὺς κανόνας τῆς ἀστρονομίας, copiato da Bessarione, sono presenti delle aggiunte, dovute all’intervento di Bessarione stesso, che si ritrovano nella tradizione manoscritta dell’opera soltanto nei discendenti del Marc. gr. Z. 333. Tali aggiunte sono tratte da un testo astronomico di Isacco Argiro e da una versione della Paradosis riveduta da Teodoro Meliteniote. L’analisi filologica e paleografica dimostra che in entrambi i casi le aggiunte sono ricavate da un (...) codice di Giovanni Cortasmeno. Ciò dimostra che il Bessarione ebbe Cortasmeno come maestro non solo nella filosofia aristotelica, ma anche nell’astronomia, e che dunque il suo interesse per questa scienza si sviluppò già nella fase poco nota della sua formazione giovanile a Costantinopoli, e non solo, come si riteneva sino ad oggi, sotto la guida di Giorgio Gemisto Pletone a Mistrà dopo il 1431. (shrink)

This paper is a preliminary study focused on the astronomical manuscript Marcianus latinus VIII.31 (2614) and its socio-historical context of use and production, the Venetian colony of Crete in the 15th century. It is a relevant source for the study of scientific interactions in colonial, multilinguistic, and interreligious contexts in the Eastern Mediterranean for at least two reasons: (a) it contains an unpublished translation into Latin of a popular Byzantine handbook on how to use a set of astronomical tables stemming (...) from Islamic sources, namely the so-called Paradosis of the Persian Tables, a work extensively copied and annotated by very significant Byzantine and Jewish scholars active in Constantinople; and (b) it provides evidence of a Byzantine product being the object of exchange in the interactions between Christians and Jews in the Cretan territory under Venetian rule. (shrink)