In 1873 the chimes were moved from a ground-level playing stand to McGraw Hall. In 1891, they were moved to their permanent home atop McGraw Tower. The 173-foot (53 m) tower is Cornell's most prominent landmark and is adjacent to Uris Library. The tower is also home to an office, museum, practice room, and a restored 1875 Seth Thomas clock with a 14-foot pendulum. Visitors can still see the clockworks and pendulum, but the clock was linked to the Global Positioning System in 1999.