Mnaseas is reckoned to have been a pupil of a scholar who was chief librarian at what library?
Eratosthenes Eratosthenes of Cyrene ( ; Greek: Ἐρατοσθένης ὁ Κυρηναῖος , ] ;  – ) was a Greek mathematician, geographer, poet, astronomer, and music theorist. He was a man of learning, becoming the chief librarian at the Library of Alexandria. He invented the discipline of geography, including the terminology used today.
National Assembly Library of Korea National Assembly Library of Korea ( Hangul:국회도서관) is a library in Seoul, South Korea. It is located in Yeouido-dong, Yeoungdeungpo-gu. It is the largest Humanities and Social Sciences Library in Korea functioning as both parliamentary and public libraries. The Library manages and preserves the National Assembly records. The Chief Librarian (vice-minister level) is a public official in political service under the Speaker of the National Assembly.