"Jan Franco" (active 1586–1615) was a physician, mathematician and astronomer who compiled almanacs. He was born in the village of Eersel in the Duchy of Brabant and studied medicine at the Old University of Leuven/University of Leuven. He settled in Brussels to practice medicine and was given the freedom of the city. He was a practicing physician at least until 1594. As he had studied both medicine and mathematics, he was asked to calculate the ephemerides, for purposes of medical astrology. This led to his work as a compiler of almanacs from 1586 to 1615. An almanac printed for 1616 refers to him as "the late Jean Franco", suggesting he died in the course of 1615.

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I would love to jump back in time and spend a day.

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All I would need is a time machine.

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