"It was 1977 and New York State needed a new ad campaign. Crime was rampant and the city's coffers were empty. Businesses (and their employees) were leaving the city in droves, and tourism was suffering. The State turned to Madison Avenue, who, in turn looked to young graphic designer Milton Glaser."

The BBC's Alastair Sooke reports on the "I Love NY" logo with interviews with Glaser and Steven Heller, among others.

Listen here.