Regiomontanus died of unknown causes in Rome, July 6, 1476, a month after his fortieth birthday.
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Regiomontanus traveled extensively, as did Pacioli.
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Muller: German mathematician and astronomer (1436-1476)
Regiomontanus is an ancient lunar impact crater located in the southern highlands region to the southeast of Mare Nubium. It is joined at the chaotic northern rim by the crater Purbach, and to the south-southeast is Walther.
The German astrologer (fifteenth century) who devised the house system that bears his name. This system is based upon twelve equal divisions along Earth's equator projected upon the ecliptic.