In the late Middle Ages, the high material and symbolic value of gold in Europe, helped by a generally low price point, led to rising demand that the Central- and Eastern-European deposits could no longer supply. This shortage made the search for gold deposits outside of Europe attractive; the centuries-long phenomenon of African gold arriving in the Mediterranean from the Sahara via the caravan trade was an important motivation for the Portuguese voyages of discovery (see Expansionism) along the west co…