Gong.

The Chinese have a thing made of a kind of bell metal, which they call a Gong, and is used as a bell at the gates of large houses &c. It is in fact precisely of the shape and size of a camp oven, about 20. I. diameter and 5. I. deep .... I wish for one to serve as the bell to a clock, which might be heard all over my farm.

Thomas Jefferson

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A short video showing the Great Clock striking the hour, first from inside Monticello and then outside next to Chinese Gong atop the house's East Front Portico ...