In the Old Town Hall’s enigmatic underground we will discover not only former Romanesque and Gothic houses, but even an original street. The labyrinthine subterranean system is older than the Town Hall itself, and the complex of medieval halls, passages and tunnels is the largest of its kind in Prague. At the point where the unspoilt streets of Prague’s Old Town give way to the redeveloped Jewish Quarter, you will see how Prague progressively grew in height.