He was born in
Solothurn and first learned painting from his father Johann Joseph Byss, and later from
Johann Heinrich Roos, whose sons he would have known well. Byss' most important works were done during his stay in
Prague. He traveled to Germany, England and the Netherlands in the 1680s to study. In 1689, he became court painter to Count Hermann Jakob Cern. Later that year, Byss married Maximiliana Wagner. Johann Rudolf Byss is credited with bringing the Netherlandish and Italian
classic styles to the art sphere in Prague. These influences are clearly present in his 1691 painting 'John of God' and in the 1692 'Vestal Claudia Quinta'. ==References==