The General Post Office (GPO) in Melbourne, Victoria, Australia, was begun in 1859 and built to the design of one A.E. Johnson in the Renaissance Revival style. You’d think this would have been sufficient, but no.
In 1885-1890, the building was expanded with a new third story, mansard roofs above that, and an even more commanding clock tower. In 2001, the Australia Post departed and the building now houses retail stores, but the landmark is still said to be considered the center of Melbourne, with all distances measured from the former GPO.