Castelo Velho, Freixo de Numão (direction: SOJ, since 1989) and Castanheiro do Vento,
Horta do Douro (direction: VOJ, JMC, LSP, ASC and, in the last years, also Ana Vale-since
1998). Both sites are located in the territory of the municipality of Vila Nova de Foz Côa,
situated in the Portuguese High Douro). The study is focused in building techniques and the
spatial organization of these huge architectonic displays. A very general comparison is …