See the AHU’s Iconoteca at
http://www.tvciencia.pt/tvcicn/pagicn/tvcicn01.asp
URL AHU: http://www2.iict.pt/?idc=100&idl=2
The Iconoteca also includes old picture postcards and engravings from Brazil, Macau, East-Timor, etc.
Old picture postcards and engravures from former Portuguese colonies
The Arquivo Histórico Ultramarino (AHU) in Lisbon has made available online old picture postcards and engravings from Angola (302 images), Cape Verde (302), Guinea-Bissau (79), Mozambique (424), and São Tomé e Príncipe (295).