Steve Athineos (center, in white) leads a bike messenger protest, 1987. Photograph by Carl Hultberg, whose work is on view through October 14 as part of the exhibition Cycling in the City, at the Museum of the City of New York.

Two Poets, 1963, a painting by Milton Avery, whose work is on view through September 8 at Victoria Miro, in Venice.

“Elemental Forms, Landscape no. 76,” a wet plate collodion with gum sandarac varnish by Nadezda Nikolova-Kratzer, whose work was on view last week as part of the group exhibition HackelBury: Twenty-one at HackelBury Fine Art, in London.

in and in and up and down below (above) and in and in and up and down below (above), paintings by Steve Roden, whose work is on view through August 24 at Vielmetter Los Angeles.

“Parula Warbler, Parula Americana, Great Spruce Head Island, Maine,” a photograph by Eliot Porter, whose work is on view through August 24 as part of the exhibition The Empathy Lab at Jessica Silverman Gallery, in San Francisco.