The Kentucky Science Center, previously known as the Louisville Museum of Natural History & Science and then Louisville Science Center, is Kentucky's largest science museum. Located in Louisville, Kentucky, on "Museum Row" in the West Main District of downtown, the museum operates as a non-profit organization. It was founded in 1871 as a natural history collection. More than half a million people visit the museum annually. Many students in Kentucky take field trips to the Kentucky Science Center. The pendulum has been a fixture of the building for decades.