The Wells Cathedral Clock is a medieval astronomical clock located in Wells Cathedral in Somerset, England. Built around 1390, it is one of the oldest working clocks in the world. The clock features a unique design that displays the time, the phases of the moon, and the position of the sun. This remarkable timepiece is notable for its intricate mechanisms and beautiful craftsmanship. It has a striking mechanism that chimes every quarter hour, and its face is adorned with various symbols. The Wells Cathedral Clock remains a significant historical artifact, attracting visitors interested in medieval engineering and art.