The IVth Crusade is the fourth studio album by British death metal band Bolt Thrower. It was recorded at Sawmill Studios in August 1992 and produced by Bolt Thrower and Colin Richardson. The album was engineered by John Cornfield and mixed at Fon studios. It was also engineered by Alan Fisch and Steve Harris. It was released through Earache Records as Mosh 70 in 1992. The album title comes from the Fourth Crusade and the capturing of Constantinople.