Most architects would be satisfied to be remembered as the standard-bearer of a new style. In the case of Michael Graves (1934-2015), that style was Postmodernism, which he introduced to the world in the form of a be-swagged, multicolored building in Portland, Oregon, in 1982. Postmodernism went on to become the dominant style of commercial and civic buildings in the United States and Europe through the mid-1990s.

But Graves—curious, restless, and a workaholic—didn’t stop there. He left his mark …