Great Clock Landing Page

What is Monticello's Great Clock?

ENCYCLOPEDIA ARTICLE - Designed by Thomas Jefferson, the "Great Clock" is located in Monticello's Entrance Hall with a second (exterior) face visible on the East Portico. Check out this description of how Jefferson designed the Great Clock and its construction at Monticello.

How the Great Clock Works

Watch this video to see how the Great Clock operates through a fine-tuned system of weights to keep track of the time and days of the week and to chime the hour with a roof-mounted gong.

Object Database Entry

Explore a full description of the Great Clock, including construction materials, makers information, additional images, and conservation processes.

The Great Clock

What is Monticello's Great Clock?

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How the Great Clock Works

Object Database Entry