Las Siete Calles or El Casco Viejo in Spanish or, Zazpikaleak or Alde Zarra in Basque are different names for the medieval neighborhood of Bilbao. The names mean Seven Streets or Old Town respectively and it used to be the walled part of the town until the end of the 19th century. The name Zazpikaleak or Las Siete Calles (The Seven Streets) come from the oldest part of the neighborhood which included exactly 7 streets and some much more narrow alleys connecting them, called cantons.
