Complex sentence: Philippe Magnier was a French sculptor (Paris, 1647-Paris, 1715) in the service of the Sun King's court painter Charles Le Brun when many works of art were required for the new, enormous Versailles castle complex.
Split into simpler sentences: Philippe Magnier was a French sculptor (1647--1715) in the service of the Sun King's court painter Charles Le Brun. He worked for Le Brun at a time when many works of art were required for the new, enormous Versailles castle complex.