The CGD's Historical Heritage Office takes on the role of a driving force for the protection, preservation and display of the heritage kept in its Historical Archive, its Museum, its Library and its External Media Library Network, through the CGD's media, through the organization of exhibitions in various areas of the head office, through its website (https://www.cgd.pt/Institucional/Patrimonio-Historico/Pages/Patrimonio-Historico.aspx), and through the support provided to internal and external researchers who resort to the Archive to carry out documentary research works.