HERANCASustainability  also means to respect and learn from the past to better build the future. To value the memory is a founding principle in Edgar Cardoso, by privileging of new and daring construction developments as well as rehabilitation  and regeneration projects of structures and facilities that will continue to operate and perpetuate the human heritage and identity.   The archive of the company includes a unique collection of technical, historical and sociological information on hundreds of relevant engineering  works in  Portugal, Angola, Mozambique, Brazil, Guinea, India, China and various other countries in thousands of documents and objects.  This collection has enforced and enriched the role of the company and its clients in the maintenance, conservation and rehabilitation of previously  designed structures that have suffered the battering of time and man, in the most different circumstances.