"The Holy Grail of Old Master paintings," valued at about $100 million, was commissioned by Louis XII in 1506.
Former hospital president argues $500K renovation to cardinal's penthouse apartment would have led to more donations.
"Columbus Day is a day that we've chosen to celebrate who we are," says a representative of an Italian heritage group.
Police said Saturday they are working to establish the circumstances and the cause of the crash.
The Kremlin is warning that Moscow could respond quid pro quo if Washington restricts operations of Russian news outlets in the United States.