Complex sentence: His son, the future Victor Amadeus I, Duke of Savoy (1587--1637) made a very prestigious marriage with the French Princess Christine Marie of France; their marriage occurred in Paris at the Louvre in 1619.
Split into simpler sentences: His son, the future Victor Amadeus I, Duke of Savoy (1587--1637), made a very prestigious marriage when he married the French Princess Christine Marie of France. Their marriage occurred in Paris at the Louvre in 1619.