The Brooklyn Museum of Art alerts us to the following Episode II items that have been added to the Star Wars: Magic of Myth Exhibition:

Seventeen objects from Episode II: Attack of the Clones joined the Star Wars: The Magic of Myth exhibition on May 16. Among the objects making their first "in person" appearance are Anakin Skywalker's Jedi Padawan costume, the battle costume worn by Padme Amidala, a production model of the Assassin Droid, and a number of concept drawings, including Doug Chiang's "Republic Attack Gunships", Erik Tiemens's "Geonosis Execution Arena", and "Obi-Wan's Starfighter" by Jay Shuster.

A few sample concept drawings added to the current exhibition:
Palpatine Costume, digital concept drawing by Dermot Power. Star Wars TM and ? 2002 by Lucasfilm Ltd. All rights reserved.
Kamino, Tipoca City, concept painting by Doug Chiang. Star Wars TM and ? 2002 by Lucasfilm Ltd. All rights reserved.
Geonosis Execution Arena, Digital concept painting by Erik Tiemens. Star Wars TM and ? 2002 by Lucasfilm Ltd. All rights reserved.