Complex sentence: Johannes Trithemius (1 February 1462--13 December 1516), born Johann Heidenberg, was an abbot, lexicographer, historian, cryptographer, polymath and occultist who had an influence on later occultism.
Split into simpler sentences: Johannes Trithemius (1 February 1462-13 December 1516) was born Johann Heidenberg. He was an abbot, lexicographer, historian, cryptographer, polymath and occultist who had an influence on later occultism.