I spent the afternoon in the Broad Museum, designed by Diller Scofidio + Renfro (who did the ICA in Boston) and opened in September 2015.   I was extremely impressed by it:  the quality of the building, with a mobile exterior skin (fiberglass reinforced concrete), very organic shapes and surfaces in the entrance hall and escalator, and huge and generous, top-lit galleries, which can ostensibly be reconfigured, but are effectively permanent;  and the quality of the permanent collection, holding works by major postwar artists, like Twombly, Jasper Johns and Beuys, in great depth.

The skin:-

The interiors:-

Jeff Koons:-

And visible storage:-