A Modernist antidote to St. Mark’s Place, this villa is a gem in itself. Guggenheim lived in this gracious home, set on the far side of the Grand Canal, with her husband, the painter Max Ernst. The house still has much of her original furniture, as well as some Guggenheim’s collection of art, which she snapped up in great quantities during the wartime tumult in Europe, when painters were desperate for customers. It includes Dalís, Kandinskys, and Braques, and the most expensive purchase Guggenheim made: Picasso’s “On the Beach,” for which she paid $10,000. There are free art talks at 5.30 p.m. Don’t miss Guggenheim’s burial spot in the garden, next to the graves of her beloved dogs.