After the Second World War, in 1947, the decision was made to move the Royal Observatory to Herstmonceux Castle and 320 adjacent acres (1.3 km2), 70 km south-southeast of Greenwich near Hailsham in East Sussex, due to light pollution in London. The Observatory was officially known as the "Royal Greenwich Observatory, Herstmonceux". Although the Astronomer Royal Harold Spencer Jones moved to the castle in 1948, the scientific staff did not move until the observatory buildings were completed, in 1957. Shortly thereafter, other previously dispersed departments were reintegrated at Herstmonceux, such as the Nautical Almanac Office, Chronometer Department, the library, and observing equipment.