In the Middle Ages, many Franks settled along the Way of Saint James in Navarre and Gipuzkoa and to a lesser extent in Bizkaia. This process also happened in Northern Castile. They were all collectively called Franks because most of them came from French regions (Normans, Bretons, Burgundians, Aquitanians etc.) but an important minority of them were in fact of German, Dutch, Italian, English and Swiss stock. Some were also from even more distant lands such as Poland or Denmark. Due to this migration, Gascon was spoken in the centre of Donostia-San Sebastián, until the beginning of the 20th century. Navarre also held Jewish and Muslim minorities but these were expelled or forced to assimilate after the Spanish conquest in the 16th century. One of the outstanding members of such minorities was Benjamin of Tudela.