E Clampus Vitus, also known as ECV or the Ancient and Honorable Order of E Clampus Vitus, is a fraternal organization that is known for its humorous and irreverent approach to history. One of the ways that ECV members preserve and promote the history of the American West is through the use of plaques.

ECV plaques can be found all over the American West, and they provide a fascinating look at the history and culture of the region. Some of the most notable ECV plaques can be found at historical sites, such as old mines and ghost towns, as well as at more modern landmarks, such as bars and restaurants.