Encountering a Reinhardt in a museum, one might find a signature black painting, stern and opaque. Yet a glance at his biographical timeline proves he was a playful wit, open-minded in his consideration of new sources of inspiration, perennially in protest, and a puckish gadfly.Reinhardt’s best-known works remain the monolithic black paintings. Vast and majestic, they reflect a singularity of vision that led from Abstract Expressionism towards Minimalism.