Last night beneath crane lights, workmen began erecting this gigantic tent below where Pineapple meets the Promenade. Curious, I wrote my friends over at the Brooklyn Heights Blog and they did some sleuthing.
According to the Brooklyn Eagle, via the BHB, it's for a sect of Hasidic Jews celebrating the arrival of European Jews at the and of WWII.
I snapped this shot of Hasidic Jews overseeing the project, when I was still trying to solve the mystery:
It looks like it's going to be a huge party. The tent is easily the size of a city block. Rock on, my Hasidic neighbors.