The Triodion (; Slavonic: Постнаѧ Трїωдь, Postnaya Triod; , Albanian: Triod/Triodi), also called the Lenten Triodion (Τριῴδιον κατανυκτικόν, Triodion katanyktikon), is the liturgical book used by the Eastern Orthodox Church. The book contains the propers for the fasting period preceding Easter and for the weeks leading up to the fast.