The City of Brotherly Love is filled with meat-and-cheese sandwich lovers. Philadelphia is defined by the big three: Hoagies (loaded Italian and chicken cutlet sandwiches), roast pork (with garlicky broccoli rabe and sharp provolone), and cheesesteaks.

The cheesesteak's story began in the 1930s in South Philadelphia but has become a staple at corner shops across the region, given the gourmet remix by award-winning chefs, and even inspired international outposts in Tokyo and London . I've been eating cheesesteaks since my college days, and as a Philly lifer, I've got plenty of opinions. Consider this your beginner’s guide.

Know before you go

Cheesesteaks are as much a part of Philly's late-night food culture as they are a daytime attraction, especially on weekends and game days. Expect long lines, limited seating, and plenty of takeout orders at popular spots, and bring cash—many old-school shops don't accept cards.…