The National Library of Wales was designed by Sidney Kyffin Greenslade, assisted by Reginald Bloomfield, and construction was carried out in stages under Adams, Holden and Pearson. Occupation started in 1916; the central block opened in 1937 and the final section of the original design opened in 1955. This aerial photograph shows the various changes and developments that have been carried out since, including the most recent storage building, extra carparking and road systems.