We just learned about Peleș Castle.
Another famous castle is the Château de Chantilly, in Chantilly France, built in 1358, and rebuilt a few times through 1882.
This Château has a very large library with thousands of books in it, and a large art museum called the Musée Condé which has many paintings by famous artists like Raphael.
There is also a horse racing track on the property that is still used.
One of the princes who owned this Château believed that some day when he died he would come back as a horse, so he had very fancy stables and race tracks to live in when he did.
(from: wikipedia - château de chantilly)
Kid Facts - Blast from the past: Guanajuato