1908: Viewing north across the Tsim Sha Tsui area in 1908, the Observatory building (indicated by an arrow) could be seen standing above the rest at a vantage point ideal for making observations.
1913: A photograph of the 1883 Building taken in 1913.
1951: An aerial view of the 1883 Building in 1951 with the No. 1 quarter on the left, and the signal mast and the annex building on the right.
At present: The Hong Kong Observatory Headquarters at present. Neighbouring to the 1883 Building, the Centenary Building was erected in 1983 as a commemoration of the 100-year service of the Observatory.