Souvenirs d'un autre monde (transl. Memories From Another World) is the debut studio album by French post-black metal band Alcest, released in 8 August 2007. The title refers to the meaning behind the music of Alcest, as its leader and songwriter, Neige, sees it as a journey through his memories of a distant world he has been in contact with.

Although it is representative of future works, the album differs notably from Alcest's first EP Le Secret (2005), distancing from Alcest's original sound, and delving into a post-metal and shoegaze-influenced direction while maintaining black metal elements in the music. It is the last release in which Neige plays all instruments, as drummer Winterhalter joined him on subsequent releases.