The first impression was overwhelming: all those colors and shapes! French-born artist Yann Gerstberger, who now lives in Mexico City, covered all the interior walls at the gallery with colorful chalk murals. The first wall on the right, for example, was taken up by rectangles in light blue, orange, and gray—a distant echo, perhaps, of the rigorously geometric painting of European modernism. But then scrawled circles supervened: possibly allusions to the sun, or simply doodles, graffiti like that we see every day on the street. Positions that not so long ago might have seemed far apart—historicist