The private collection of antique cars of H.SH Prince Rainer III of Monaco was a huge car enthusiast and amassed a vast collection of vintage vehicles.In 1993, he decided to reveal them to the public and they can still be seen today in Monaco's Terrasses de Fontvieille.Car-mad Rainer began building his collection in the early 1950s and, over the next 40 years, amassed a haul of around 100 automobiles, ranging from a 1903 De Dion Button to a 2013 Lotus F1.