Krystyna Kobylańska (born August 6, 1925 in Brześć - January 30, 2009 [1]) is a Polish musicologist (and former Curator of the Fryderyk Chopin Society Museum in Warsaw). In 1979 she authored Frédéric Chopin: Thematisch-bibliographisches Werkverzeichnis (known as Kobylańska Katalog or KK). It is a complete (and definitive) thematic catalogue of all the works by Frédéric Chopin.[2]