Complex sentence: Sébastien Bourdon (2 February 1616--8 May 1671) was a French painter and engraver, the son of a Protestant painter on glass at Montpellier; his "chef d'œuvre" is "The Crucifixion of St. Peter" made for the church of Notre Dame.
Split into simpler sentences: Sébastien Bourdon (2 February 1616--8 May 1671) was a French painter and engraver. His "chef d'œuvre" is "The Crucifixion of St. Peter" made for the church of Notre Dame.