Created exclusively for Star Wars Celebration III, which was held at the Indiana Convention Center in Indianapolis, Indiana from April 21-24, 2005.
Officially licensed by Lucasfilm, the print was sold directly by the artist at his booth as part of the Celebration art show at the event.
From StarWars.com:
"Brent Woodside, a recent Topps Revenge of the Sith Sketch card artist, has illustrated this great Episode III print available exclusively at Celebration III. The heroes and villains of Sith are here, with a cameo by Clone Wars villainess Asajj Ventress. Illustrated by Woodside with coloring by Chelsea Gallion, this print measures 11"x17" has an edition size of 250."