Complex sentence: Michelangelo Palloni (1637--1712) was an Italian Baroque painter, who worked in the Polish-Lithuanian Commonwealth from 1674 and in 1688 became a court painter of the Polish king Jan III Sobieski.
Split into simpler sentences: Michelangelo Palloni (1637--1712) was an Italian painter of the Baroque period, who worked in the Polish-Lithuanian Commonwealth from 1674 onward. In 1688, Palloni became a court painter of the Polish king Jan III Sobieski.