Lippizaners

http://en.wikipedia.org/wiki/File:Maestoso_Basowizza_%26_Oberbereiter_Hausberger.jpg

Although they're silent, the Lippizaners are important characters in "The Lost Princess." The Lippizaners are a rare and highly trained breed of horses. The tricks that they can do, the poses they can take, and the steps they take are very graceful but they developed from the battlefield. They are now primarily used for competitions and performances. Still, if you look at the poses, you may recognize poses in both paintings and sculptures that generals and their horses take (like this:

 
Here are two videos of Lippizaners performing, one that showcases the different steps and poses Lippizaners can do: http://www.youtube.com/watch?v=3QkCJ6LhqDY&NR=1

... and one that was filmed at the Spanish Riding House in Vienna, which could have been much like the show Anna would have seen:
http://www.youtube.com/watch?v=Pn6Jmqs9IHQ&feature=related