The walls and fireplaces are not the only structures that are covered with tiles. Most of the Castle’s many structural column capitals are encased with Mercer’s tiles. Everywhere you look there are tiles, tiles and more tiles. This image is taken from the main level looking up at the second floor of the Library. The Library has concrete bookshelves lining the walls to accommodate the thousands of history and reference books collected by Mercer.
The ceilings of most rooms are also covered with tiles as shown below. Remember … Plus Ultra!