Highcastle: A Remembrance (Polish: Wysoki Zamek) is a coming-of-age autobiographical novel by Polish science fiction writer Stanisław Lem. Written in 1965, it was first published in 1966 by Wydawnictwo MON. It is a memoir of Lem's childhood and youth years spent in the interwar Lwów (then a Polish city, present-day Lviv in Ukraine), with a good deal of philosophical musing on memory, imagination, and the impact of earlier years on later life. The novel title is a reference to the ruins of Lviv High Castle. It was also translated into Russian (1969), Bulgarian (1985) and Ukrainian (2002).