Half would go to taxes, leaving 170 million for myself.
I would give each family member 3 million and keep 3 million for myself. I'd give my Church 10% and with the remaining money, I would give 1 million each to 60 of my closest friends.
This is going to sound silly but I would buy some land on either side of Elysian Fields Avenue in New Orleans (the Champs Elysees) and build "The Arch of Triumph."
I'm not sure if the French would like it or the anti-French would dislike it, but hey, it's what I would do...