On the entryway to "Viva Arte Viva" is a colorful piece by Sam Gilliam, Yves Klein Blue, from 2015.

On the entryway to “Viva Arte Viva” is a colorful piece by Sam Gilliam, Yves Klein Blue, from 2015.

The 57th edition of the Venice Biennale opened to select members of the press today, with a preview that lasts until May 12. Below, a brief look at the main exhibition—”Viva Arte Viva,” curated by Christine Macel—and some of the action at the national pavilions.