Administrative divisions of Portugal (on Terceira Island), the historical and cultural capital, is the home of the Azorean judiciary and seat of the Diocese of the Azores. Madeira is an archipelago that includes two principal islands, Madeira and Porto Santo, plus two uninhabited natural group of islands, the Desertas and Savage Islands (). The archipelago is located closer to Africa than Europe, is highly commercial and urbanized; its regional capital (Funchal) is developmentally comparable to urban centers in the Canary or Balearic Islands. The division of the Portuguese territory is established in title eight (Título VIII) of the Portuguese constitution: granting local authority to
Madeira River barges in Porto Velho, where both Cargill and Amaggi have loading facilities, and then shipped down the Madeira to the ports of Itacoatiara, near the mouth of the Madeira, just upstream on the left bank of the Amazon, or further down the Amazon, to the port of Santarem, at the mouth of the Tapajos River. From these two ports, Panamax type ships then export the grains - mainly soy and corn - to Europe and Asia. The Madeira waterway is also used to take fuel from the REMAN refinery (Petrobras) in Manaus, state capital of Amazonas, to Porto Velho, from