sentences:  Abraham Cresques was a 14th-century Jewish cartographer of the Majorcan cartographic school from Palma; Cresques is credited with the authorship of the famous Catalan Atlas.The river that cut through the city gave rise to two distinct areas within the city; the "Upper town" and "Lower town", depending upon which side of the river one was situated.The city's advantageous geographical location allowed it extensive commerce with Catalonia, Valencia, Provence, the Maghreb, the Italian republics and the dominions of the Great Turk, which heralded a golden age for the city.