A centennial conservation-restoration of the Statue of Liberty (Liberty Enlightening the World) occurred between 1984 and 1986. The Statue of Liberty, by French sculptor Frédéric Auguste Bartholdi, is a colossal sculpture on Liberty Island in New York Harbor and is a part of the Statue of Liberty National Monument. Much of the restoration effort was based on unprecedented restorative methods, as metallurgical repair work on such a large scale had never been attempted. Many scientists, engineers, government organizations, and professional consultants evaluated and dealt with the various problems and tasks facing the restoration effort.