Deadbolt Locks
Archeologists discovered the oldest door lock identified to date among the Khorsabad palace ruins near Nineveh. Estimated to be 4,000 years old, the door lock was a precursor of the pin and tumbler style lock, which was common to the ancient Egyptian culture. The door lock employed a large wooden bolt with several holes drilled through the surface and into the door that were fitted with wooden dowels to secure the porthole.