La Regina del Mare Adriatico Arc

La Regina del Mare Adriatico Arc or The Queen of the Adriatic Sea Arc is a story arc in Toaru Majutsu no Index. The arc is concerned with Kamijou Touma mysteriously winning a trip to Northern Italy despite his misfortune. Here, he is suddenly caught in another conspiracy by the Roman Catholic Church, this time regarding the mobilization of an ancient weapon against Venice, The Queen of the Ardriatic Sea.

This arc would mark the Roman Catholic Church's final time as the antagonists before the intervention of God's Right Seat.

Sounds of war
With the considerable weakening of the Roman Catholic Church after the destruction of their knights and one of their most powerful spells. As well as the embarassing fiascos with the capture and execution of Orsola Aquinas, and the capture of Lidvia Lorenzetti and Oriana Thomson by the Anglican Church after the failed capture of Academy City through the use of the Croce di Pietro. Every event has been beneficial to the science side (and the Anglican Church) and has greatly increased their power.

The Roman Catholic Church under the Pope finally allowed the mobilization of The Queen of the Adriatic Sea under Bishop Biagio Busoni's command, in order for the complete and utter destruction of Academy City and everything connected with it to take place. Although Biagio is concerned by the promptness of the Pope's order to mobilize the weapon, he accepts the order.