query: Who invented Hangul?
passage: Origin of Hangul
Hangul was personally created and promulgated by the fourth king of the Joseon dynasty, Sejong the Great.[1][2] Sejong's scholarly institute, the Hall of Worthies, is often credited with the work, and at least one of its scholars was heavily involved in its creation, but it appears to have also been a personal project of Sejong.
passage: Hang (instrument)
There are only two people who built Hanghang, the inventors Felix Rohner and Sabina Schärer. They have a small workshop in Bern where every Hang has been created.