Where is the oldest known restaurant in the world?

Sobrino de Botín in Madrid is often cited by Guinness World Records as the oldest continuously operating restaurant in the world. It opened in 1725 and has served customers for nearly three centuries. The restaurant is famous for traditional Spanish dishes, especially roast suckling pig and roast lamb. Its long history includes literary connections; Ernest Hemingway mentioned it in his writing. Botín’s cellars and ovens preserve a strong sense of historic continuity in the center of Madrid.