Bad Cannstatt, formerly just "Cannstatt" or "Kannstadt" is one of the outer stadtbezirke, or city districts, of Stuttgart in Baden-Württemberg, Germany. Bad Cannstatt is the oldest and most populous of Stuttgart's districts, and one of the most historically significant towns in the area of Stuttgart. The town is home to the Cannstatter Wasen and Cannstatter Volksfest beer festivals, the Mercedes-Benz Arena (VfB Stuttgart), the Hanns-Martin-Schleyer-Halle, and the Porsche-Arena.