From the iconic black-and-white fashion imagery of Cecil Beaton and Horst P. Horst to modern-day photographers' scenes from Syria and Saudi Arabia, the 20th edition of Paris Photo this weekend saw the Grand Palais play host to all manner of stand-out photography from the last century. Survey the best shots from over 150 galleries around the world, featuring everyone from Audrey Hepburn to Muhammad Ali to David Hockney's parents, here.