The Trinity Church was constructed from 1872 to1877 in Boston, Massachusetts, and was designed by Henry Hobson Richardson. The church is the only church in the United States that has been honored as one of the “Ten Most Significant Buildings in the United States.” The church is built in a classical cross structure with four arms extending outwards from the central tower. The base was built atop of Boston’s Back Bay, which was originally a mudflat. Because of this, Trinity rests on some 4,500 wooden piles which have been driven through 30 feet of gravel fill, silt, and clay. The outside of Trinity is built into three separate layers which lead into the tower in the center. The bottom level is decorated in columns that hold up the front facade. The second level features two towers that are constructed in a gothic style much like the central tower on the third level. The interior is large, wooden, and colorful with murals covering over 21,500 square feet along the inner walls. Light falls into the center of the church from windows in the central tower. The apse in typical fashion is built into a semicircular recess and covered in a hemispherical vault. The wall of the apse is decorated in gold and holds several pieces of stained glass.