Governor Pedrarias began building intercontinental and trans-isthmian portage routes, such as the "Camino Real" and "Camino de Cruces", linking Panama City and the Pacific with Nombre de Dios (and later with “Portobelo”) and the Atlantic, making possible the establishment of a trans-atlantic system of Treasure Fleets and trade. It is estimated that of all the gold entering Spain from the New World between 1531 and 1660, 60% had arrived at its destiny via the 'Treasure Fleet and Fairs' system from Nombre de Dios/Portobello.