Valentino
Since taking the reins, creative director Pierpaolo Piccioli has faced numerous challenges, the most basic of which is keeping Valentino true to Valentino after the designer's retirement in 2008. Piccioli served as accessories designer under Valentino for more than a decade and understands exactly how to make the next generation of Hollywood stars swoon. Valentino fills most of Piazza di Spagna, where the designer lived for decades in a lovely palazzo next to one of the multiple boutiques showcasing his eponymous designs with a romantic edginess—think studded heels or prêt-à-porter evening gowns worthy of the Oscars. Rock stars and other music lovers can also have their Valentino guitar straps personalized when they buy one at this enormous boutique.