Complex sentence: In 1565, he became the professor of mathematics at the Basel University, in 1585, he became the professor of theology, and the next year, the city magistrate appointed him to the academy as a town historian, a position he held until his death.
Split into simpler sentences: In 1565, he became professor of mathematics at the Basel University, and in 1585 professor of theology. The next year, the city magistrate appointed him to the academy as a town historian, a position he held until his death.