Included among the works that make up the Historical Collections in the Vatican Museums is a conspicuously large number of weapons and armor dating from the mid-1500’s to the end of the 1800’s. Among the armor, in addition to the large amount traditionally regarded as that belonging to Pope Julius II, there is a series of pieces that for a long time were used by the Swiss Guard. These were on display until the 1960s in the Hall of the Pontiffs of the Borgia Apartments. For ﬁfty years they were hidden in storage. Now it is time for some of these treasures to be exposed anew so that they might receive once again the admiration of the many Museum visitors and, in turn, share with these admirers their historic legacy. The exhibition project that would occupy part of the Sacred Apostolic Palaces means that a certain number of breastplates are chosen to undergo restoration in the laboratory dedicated to metals and ceramics. Upon restorative completion, the breastplates will constitute a splendidly, arrayed framework of magniﬁcent armor: from the procession of Julius II to the tournament with Constable Colonna.