In 1908, Henry Mercer wrote and published at his own expense this guidebook to the various tiles and mosaics in the Pennsylvania Capitol so that visitors could read and appreciate the work as they strolled through the corridors and the great rotunda. Each mosaic had a significant story to tell and Mercer thought the story of the tiles and his own artistic intentions had to be communicated. Unavailable for many years, this newly reprinted guidebook is a useful tool in understanding the history of the Keystone State, as well as a record of this very important architectural masterpiece.