F305. 270 items: manuscripts from the 17th century to 1985. In Karaim, Hebrew, Russian, and Polish. Described in the Manuscripts Department’s card catalogue.

The founder of this collection is Simonas Firkovičius (Simon Firkovich, 1897–1982), historian of the culture of Lithuanian Karaites, writer, Trakai kenesa hazzan, hakham.

The collection was acquired in 1976 m. from Simonas Firkovičius.