(2014) Consisting of 176 2D-portraits in Lego which are set onto a large floor space, "Trace" was commissioned by the FOR-SITE Foundation, the United States National Park Service and the Golden Gate Park Conservancy. The original installation was at Alcatraz Prison in San Francisco Bay; the 176 portraits being of various political prisoners and prisoners of conscience. After seeing one million visitors during its one-year display at Alcatraz, the installation was moved and put on display at the Hirshhorn Museum in Washington, D.C. (in a modified form; the pieces had to be arranged to fit the circular floor space). The display at the Hirshhorn ran from 28 June 2017 – 1 January 2018. The display also included two versions of his wallpaper work "The Animal That Looks Like a Llama but Is Really an Alpaca" and a video running on a loop.