Until the 14th century, most people divided the period of daylight into 12 equal parts and the period of darkness into 12 equal parts, regardless of how long each period was. Mechanical clocks changed the way time was measured. After they came into use, each 24 hour period was divided into equal measures of time.
The Salisbury Clock doesn't look like an ordinary clock. It doesn't have a dial. Its purpose was to ring a bell on the hour every hour so people would know what time was. In the 14th century people listened to clocks; they didn't look at them. In 1884, the Salisbury Clock was replaced by a more modern clock and the original clock was stored away and forgotten until 1928, when it was rediscovered and put on display.
Read the following article on Salisbury Clock: The World's Oldest Working Clock
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