Black Lines (Schwarze Linien), December 1913, by Vasily Kandinsky

Art and architecture often have a symbiotic relationship, and what better example than the Solomon R. Guggenheim Museum? Its iconic spiral design, fashioned 50 years ago by the legendary Frank Lloyd Wright, seems to ascend from the bustling sidewalk. And its walls, lined with an ever-evolving collection of contemporary art, are envied the world over. Enter the new era of envy as “Kandinksy” opens to the public on September 18. The Russian artist was a personal favorite of Guggenheim’s, and this four-month retrospective is particularly fitting, as it coincides with its host structure’s half-century anniversary. Here’s to the next 50 years. The exhibit will be unveiled during the 2009 Guggenheim International Gala on September 16. 1071 Fifth Ave., 212-423-3500; guggenheim.org