"Belvedere, Part 4" (天文台④ Beruvedēre ④?) is the 83rd chapter of Toaru Majutsu no Index manga, released on July 12, 2014.
- Kamijou Touma turns the tables around and defeats Oriana Thomson in combat.
- Oriana's flashback reveals that in her youth she has robes similar to that of a Roman Catholic nun.
- The terrorist attack that killed the old woman Oriana was helping during her childhood may be a reference to the 7 July 2005 London bombings, where one of the terrorists bombed a double-decker bus.
- The BBC is shown to be the one reporting the terrorist bombing of the double-decker.