1444 - Born Roelof Huysman in Baflo, Groningen on February 17, 1444.
1468 - Studied at the University of Pavia.
1470 - Able to teach a deaf child to communicate verbally and in writing.
1477 - Became the official organist to the Ducal Chapel.
1479 - Able to finished "De inventione dialectica (On Dialectical Invention)".
1481 - Spent six months in Brussels at the royal court of Maximilian I.
1482 - Accepted the invitation of the Bishop of Worms to have a lecture at the University of Heidelberg.
1485 - Died in Heidelberg on October 27, 1485.
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