The billionaire Italian collector and jewelry magnate is known for his extensive stable of classic autos, a sizable portion of which reside at a private, newly built display facility near Allentown's Coca-Cola Park, under the care of Keith Flickinger. It is that, and Bulgari's fondness for a particular make that is expected to bring more than 2,000 Buick collectors to the Lehigh Valley next summer for the Buick Club of America's 50th anniversary celebration, a four-day event that could fill local hotels and restaurants with what may be the largest convention to hit the region in decades.