 Stones included in the wall are from such sites as the St. Stephen's Cathedral, Trondheim Cathedral, Taj Mahal, Clementine Hall, the Parthenon, Hagia Sophia, Corregidor Island, Palace of Westminster, petrified wood from the Redwood National and State Parks, the Great Pyramid, The Alamo, Notre Dame de Paris, Abraham Lincoln’s Tomb, the Great Wall of China, Independence Hall, Fort Santiago, Angkor Wat, Ta Prohm, Wawel Castle, Banteay Srei, and Rouen Cathedral's Butter Tower, which inspired the shape of the building.Some of these had a political or social context such as the stone from the Berlin Wall and the column fragment of Wawel Castle located in its own niche over the upper-left corner of the main entrance, as a visual tribute to Chicago's large Polish population, the largest such presence outside of the Republic of Poland.There are 149 fragments in the building.