Hilma af Klint’s strange spiritual works predate those of any other abstract painter by several years. Long unknown, she is now the subject of a retrospective at the Guggenheim.

Etel Adnan wasn’t there. “It’s hard for her to travel these days,” Photi told me. Too bad, I thought. She is an iconic Lebanese-American cultural figure and I had hoped to meet her. She was also missing out on the impressive turnout in her …

On a recent Friday night, lured by the promise of a secret performance, a throng of people piled into a small basement on Eldridge Street. By the time I had arrived, the place was densely packed, and in wading through the crowd I noticed that a foamy…