Complex sentence: It eventually cost over 15 million livres, of which nearly two million came from Riquet himself, leaving him with huge debts, and he died in 1680, just months before the Canal was opened.
Split into simpler sentences: It eventually cost over 15 million livres, of which nearly two million came from Riquet himself, leaving him with huge debts. He died in 1680, just months before the Canal was opened.