To make the art database more usable, we have built in the ability to organize art using lists. Lists are collections of art you can customize. Only your location can see your lists.
You must use lists to add any art to your events. Simply go to the Art Management page and create a list. Add the art you wish to use to the list. Once in your Event Calendar, click Add Art and chose the list you wish to use. You will see all of art you have added to the list. Select the correct art work and you are done. This article explains adding art in more detail.