A monastery built more than twelve centuries ago and said to house an extensive basement library.

Orbonne Monastery is a location from Final Fantasy Tactics. It is a monastery of the corrupt Church of Glabados, and houses the Underground Book Storage, a mysterious library holding old tomes from the era of St. Ajora, where much of the game takes place.

Princess Ovelia Atkascha took refuge at Orbonne Monastery during the events leading up to the War of the Lions. Her bodyguard Agrias Oaks, fearing for her safety, hired Goffard Gaffgarion and his mercenary troop to protect Ovelia. One of Gaffgarion's soldiers was Ramza Beoulve, whose sister Alma had also spent time at the monastery. The monastery came under attack by the Order of the Northern Sky, disguised as the Order of the Southern Sky.

Then Ramza, Agrias, and Gaffgarion rushed outside to deal with the attackers. During the fight, Delita Heiral, a real Southern Sky knight, slipped in a back door and abducted the Princess. Agrias heard Ovelia's screams and rushed back inside to help her, but it was too late: Delita escaped on his chocobo, but not before Ramza sighted him and recognized him. Ramza and Agrias then set off after Delita in order to rescue Ovelia.