Pedra Angular is a non-profit cultural and scientific association founded in 1996. Its mission is to study, safeguard, and promote the environmental, cultural, and scientific heritage of the Alentejo region, with particular emphasis on monuments, landscapes, sites, museums, collections, libraries, archives, galleries, and intangible cultural assets.

According to its bylaws, the association also aims to foster the vitality and visibility of this territory, particularly in the fields of artistic creation and programming, biodiversity conservation, technological innovation, scientific dissemination, and social support.

Pedra Angular is a member of the European Festivals Association, FestClásica – Asociación Española de Festivales de Música Clásica, Aporfest – Associação Portuguesa de Festivais, EFA – European Festivals Association, Europae Thesauri, and Future for Religious Heritage. It is also certified with the EFFE Label.