As 20 years have passed since the inauguration of the Alqueva dam and the submersion process and subsequent project to minimize the patrimonial impact of the various archaeological sites, the Luz village Museum opens an exhibition dedicated to the Castelo da Lousa archaeosite, classified as a National Monument. Although the Castelo da Lousa is submerged and the remains resulting from the excavations prior to its submersion continue to be the subject of constant studies. This exhibition is the latest historical, archaeological and research review of this archaeological site.

Castelo da Lousa is an archaeological site from the Roman period located in the parish of Luz and is currently submerged by the Alqueva reservoir.
Known since always by the population of Luz, who would have given it this name, it was only from the mid-20th century onwards that it was the subject of archaeological work.
It was in the 1960s that Afonso do Paço and Joaquim Bação Leal began their first archaeological investigations. These works proved to be fundamental for the classification of the archaeosite as a National Monument in 1970.
The Castelo da Lousa would also be the target of archaeological work in two other different periods. In the 80's by the hand of the German archeologist Jurgen Wholl. At the end of the 1990s, under the command of EDIA, the archaeological site was the target of several archaeological campaigns, with the aim of collecting the maximum amount of archaeological remains and preparing work to minimize the heritage impacts caused by the construction of the Alqueva dam. and subsequent creation of its reservoir that caused the submergence of this archaeological site.
The remains resulting from the various excavations continue to be studied and the very function of this archaeological site occupied in the 1st and 1st centuries BC continues to be debated.
The exhibition that the Museu da Luz presents is the most recent state of the art on the subject.