Photos of Sydney Observatory on Observatory Hill, The Rocks, from the late 19th and early 20th century taken from the Powerhouse Museum's Tyrrell Collection.
These photos were taken in the area now known as The Rocks. Many of the street names have since changed and some areas were demolished to build the Bradfield Highway (and the Sydney Harbour Bridge). The City of Sydney Council publishes a guide to old Sydney street names which is useful in identifying many of these locations.