In Terryville, Connecticut, this institution preserves the history of locks and locksmithing in the United States while reflecting the town’s industrial heritage through its connection to the original Eagle Lock Company site. Created from the collections of locksmith Thomas F. Hennessy and Eagle Lock, it grew into a major center for industrial and security history. Its holdings, described as the world’s largest collection of locks, range from a 4,000-year-old Egyptian pin-tumbler lock to products by major American makers. Across eight rooms, visitors encounter lock and key displays, bank and safe locks, ornate hardware, and Linus Yale Jr.’s 1865 patent model Mortise Cylinder Pin Tumbler Lock.