Boundary post No 20 Survey marker The most complete boundary post of four remaining original boundary markers which is at Town Hall Square, on the south-east side of the Town Hall steps. This is not its original location, which is unknown. image Locate -33.873377419082, 151.20664158226 Position Builder Sydney Foundry and Engineering Works {"name":"Builder","target":"Sydney Foundry and Engineering Works","target_text":null,"date":{"#markup":"<span class='date'><\/span>"},"date_start":null,"date_end":null} Type Survey marker {"name":"Survey marker","target":"","target_text":null,"date":{"#markup":"<span class='date'><\/span>"},"date_start":null,"date_end":null}