How to define a dandy? Today they come in all ages, nationalities, races, occupations and sartorial styles, but all share an obsession with elegance, which they express in ways unique to them. That’s the conclusion the authors of the new book I am Dandy: The Return of the Elegant Gentleman came to, as they tracked down the globe’s most stylish gentlemen.

Here, writer Nathanial Adams and photographer Rose Callahan introduce us to their favorite, most eccentric dandies from around the world.