The earliest section of photographs and negatives in the Iconographic Archive used to be part of the documental heritage of the old Museu dos CTT, even though it did not have a specific area dedicated to photographic documentation. Today, the Iconographic Archive is part of the FPC's Documentation and Information Centre.
The collection consists of diverse iconographic documentation from the now defunct company CTT - Correios e Telecomunicações de Portugal. The artifacts are essentially related to the field of post and telecommunications, and communications in general, and consist of a total of 35,000 items ranging from collections of photos and slides to maps, engravings, posters, drawings and video cassettes.
Dating from the end of the 19th to the 21st century, these documents attest to the evolution of the sector, the appearance of new means of communication, the creation and development of postal and telecommunications services and technological innovation.