"The Rose" from Notre-Dame de Reims

Origin
The Notre-Dame de Reims, or Our Lady of Reims, is a Cathedral located in Reims, France. Built in the 13th century, it is a stunning example of medieval architecture. It also houses a fascinating history, being the site of royal christenings, marriages, funerals, feudal uprisings, and the failed English siege of 1359-1360 during the Hundred Year War. One of its most mesmerizing features includes "The Rose", a rose window styled stained glass fixture found at west side of the cathedral. It depicts Christian biblical scenes, and is meant to glorify the name of the Virgin Mary, the patroness saint of the church.

Effects
Those that gaze upon the glass as light shines through it may see an important vision portrayed in the glass, if the window wishes it.

Collection
The Rose was crafted with such care and love that it developed a sort vanity. During the Siege of 1359-60, it didn't want to be shattered by English forces. To protect itself it gained the ability to rearrange it's glass in order to portray current or future events to select onlookers. Using the visions displayed in the glass, the French were able to repel the English. It has remained largely inactive since then.

It was collected in 1870s while the window was being restored. It arose suspicion after it began showing visions of the ongoing Franco-Prussian War.