CDA Monument: Heroes of Espionage

 is a limited-time decoration.

It can be found as a cycling reward in the Enchanted Chests.

Trivia

 * The purchase cost was discounted to 48 during the Mother's Day Sale 2016 on 7th May 2016.
 * lost it's premium status when it was available in the Enchanted Chests with the Earth Day, Easter Update on 12th April 2017.