The Observatory again opened its doors to the general public for the week 6-11 September 2004, as part of the UK and Ireland Archive Awareness Campaign and European Heritage Open Days. The Librarian, John McFarland, produced an excellent exhibition for the event, which had as its theme ``Routes to Roots''. He also produced a highly informative brochure for the exhibition, entitled ``The Development of Astronomy at Armagh''. For a second year running the Observatory collaborated with the Armagh Public Library and other museums and specialist libraries in the City, resulting in a record number of visitors to the Observatory for this event. Group tours were carried out by the Librarian and other staff, notably Ana Maria García Suárez, Babulakshmanan Ramachandran, Chia-Hsien Lin, and Miruna Popescu. Further information can be obtained from the web-site (http://star.arm.ac.uk/archive-exhibit/) and accompanying media information sheets (e.g. http://star.arm.ac.uk/press/AAW0904_pr.html). During the week a total of approximately 115 members of the public visited the Observatory for these events.