Studied in Vienna, between 1450 and 1461, with the astronomers Georg von Peurbach (1423-1461) and Johannes Müller, known as Regiomontanus (1436-1476). In c. 1470, entered the service of the King of Hungary Mathias I Corvinus (1440-1490). Build many scientific instruments including astrolabes, celestial globes, armillary spheres, torquetums, and sundials. In 1490, after the King's death, returned to Vienna, retiring to a Benedictine monastery where he remained until his death.