There were/are several famous Italian design houses and body manufacturers, Pininfarina, Zagato, Bertone, Giugiaro and Ghia come to mind. Some of them designed for various car manufacturers and the final models bear a distinct resemblance. On the less exclusive end, I was always amazed how much my very first car, a Fiat OSCA 1500S looked like a Peugeot 405 Cabriolet until I found out that both cars were designed by Pininfarina