Azulejos de Lisboa: Colin Manning gives a photographic tour of some of the Portuguese tiles, known as azulejos, which adorn the inside and outside of almost every home in Portugal.
Directorate General for National Buildings and Monuments: The official guardian of Portugal's architectural heritage. Portuguese and English versions.
World Heritage Sites in Portugal: Manor Houses of Portugal Promotions provides photographs and descriptions of historic buildings given the status of 'World Heritage Sites' by UNESCO.