ENMiasto Sagena (The City of Sagena), to this day unpublished and unresearched Czesław Miłosz’s novel, is made subject of the paper. On the first plan it is a piece about Vilnius written as a roman à clef. The researcher identifies the real places, events, and figures hidden under the literary façade, as well as presents two layers of meaning, namely the political, to which Zniewolony umysł (The Captive Mind) is a clear context, and the metaphysical-religious one, in the examination of which she uses Ziemia Urlo (The Land of Urlo). Miłosz’s novel is analysed as a parable and juxtaposed with the author’s other works to promote a holistic mode of reading. Keywords: Czesław Miłosz, "Miasto Sagena" ("The City of Sagen"), novel, Vilnius, parable. [From the publication]