International art dealer Guy Wildenstein (L) and his lawyer Herve Temime (C) leave the court on the opening day of his trial in Paris, France, January 4, 2016. Wildenstein, 70, Franco-American heir of a New York art-dealing empire, is going on trial on charges of defrauding the French state of half a billion euros (about $550 million) in taxes, after two relatives tipped off authorities about the family's financial dealings. REUTERS/Charles Platiau