Complex sentence: In 1460 the papal legate Basilios Bessarion came to Vienna on a diplomatic mission, a humanist scholar and great fan of the mathematical sciences Bessarion sought out Peuerbach's company.
Split into simpler sentences: In 1460 the papal legate Basilios Bessarion came to Vienna on a diplomatic mission. Being a humanist scholar and great fan of the mathematical sciences, Bessarion sought out Peuerbach's company.