A classic restaurant is like an old friend: familiar, often endearingly imperfect, and a place you’ll defend at all costs. In Austin, they tend to represent a time when the city was smaller and less inundated by traffic—most of the ones on this list are humble and quirky. A few may have even changed the way people eat here. Not every classic needs to have ancient history attached to it, nor does it have to produce spectacular cooking. It can have great tacos but bad lighting, average seafood and an amazing atmosphere. As long as it gives everyone that feeling—that indefinable rightness—well, then that’s what makes it a stone-cold classic.