Perth Town Hall stands at the corner of Hay and Barrack streets, a handsome Gothic Revival building in warm limestone that looks slightly incongruous next to the surrounding glass towers. It was built between 1867 and 1870 using convict labour — the last major public building in Australia to be constructed this way — and the convicts apparently left their mark deliberately. The broad arrow design hidden in the tower windows is one of Perth's better architectural Easter eggs, and most people walk past without noticing it.
The building is still used for civic functions and occasional public events, so the interior is not always accessible to casual visitors, but the exterior is striking enough to justify a short detour. It sits in the heart of the CBD, a short walk from the Murray Street Mall, and forms part of the cluster of colonial-era buildings that survive in an otherwise thoroughly modernised city centre. The town hall clock tower has been keeping time since 1870 and remains a useful landmark when navigating the grid of city streets on foot.