Its name is due to its location, in the part of Madrid that enjoyed its glory years during the time of the Hapsburgs. This is the perfect place to relax after a day's sightseeing or when you're passing through one of the prettiest and oldest parts of the capital.
More than a café, it offers some of the most traditional tapas in Madrid. It has an extensive menu, as well as wine tasting. This is a great corner to chat and while away the afternoon, decorated in classic 20th-century café style.