Angbu-ilgu
Angbu-ilgu is a concave sundial shaped like a hemisphere and was first made 16 years' rule of King Sejong (1434). That was composed of the hour lines, the seasonal lines, sibanmyeon, Yeoungchim and the horizonal surface.
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- 앙부일구 <仰釜日晷>[permanent dead link] ::: 대교학습백과 :::
- Hemispherical sundial with a central gnomon point Archived 2022-11-29 at the Wayback Machine Kotsana's Museum