Korean Hemispheric Sundial
Replica of Korean Hemispheric Sundial (Angbu Ilgu) c.1434. The sundial was made in the reign of King Sejong, 1418-1450. This sundial has its gnomon pointed toward the North star (Polaris). It cast a moving shadow along intersecting arcs to indicate the time and the season. The time interval are represented by vertical arcs and the seasons by horizontal arcs.