The Peggy Guggenheim Collection houses a first-class collection of 20th-century art from Dali to Duchamp in a beautiful white palazzo on the Grand Canal, and the Punta della Dogana, a contemporary art centre at the tip of Dorsoduro, contains the modern art collection of Francois Pinault, the CEO of Kering, which owns labels like Gucci and Saint Laurent.

BBC: Living in: Venice

Mr. Nulty has a collection of more than 400 airplane models plus old ads and posters, TWA first-class menus from 1960s and paper dresses worn by TWA flight attendants.

WSJ: Airline Collectibles Take Flight