[1] In 1464, he was in Rome as the astrologer to a cardinal - either Pietro Barbo, who was elevated to the papacy as Paul II in that year, or Rodrigo Borgia, the future pope Alexander VI.
They jointly developed astronomical tables and Disputationes inter Viennensem et Cracoviensem super Cremonensia in planetarum theoriae deliramenta (lat.
Not long after, Bylica and Regiomontaus were summoned by John Vitéz, archbishop of Esztergom, and his nephew Janus Pannonius, bishop of Pécs, to join their recently founded university in Presburg, known as the Universitas Istropolitana.
The appointment followed a public disputation he had with his colleague Johannes Stercz, almost certainly in Presburg, in the presence of the king and his court, about the horoscope of the conception of the son of count János Rozgon.
The book collection includes works by Regiomontanus and Georg von Peuerbach, as well as the Tractatus Astrarii by Giovanni Dondi dell'Orologio.