It takes a truly remarkable song—and vocal performance—to become the hallmark tune in a career as legendary as Tony Bennett’s, but “I Left My Heart in San Francisco” is exactly that. Written by George Cory with lyrics by Douglass Cross, it was originally released as the “b” side of another Bennett record by his label, Columbia. Soon after, DJs across the country became far more infatuated with it than the song on the other side of the disc and soon listeners were in love with it too. “I Left My Heart in San Francisco” would be covered by dozens of other artists, but Bennett’s version remains the definitive rendition. His recording would later be adopted as one of the official themes for The City by the Bay.