Filling the entirety of KEWENIG’s gallery space, Christian Boltanski’s “Danach” (translating to “Afterwards”) features the artist’s most iconic works. Open through June 26, the show highlights the artist’s exploration of themes like the transience of the individual and remembering through installations like Coeur (which includes a recording of the artist’s heartbeat pulsing in time with flickering lightbulbs), the 1996 Crépuscule, and the LED light Guirlandes,