I saw an AMV maybe a year ago.
In it there was a girl who had marks around her neck. The AMV had moments in which people were guillotined, and it appeared that the girl carried a curse with her, that wherever she'll go, she will bring death and chaos.
The AMV also showed some moments of revolution or something like that.
I wanted to know on which Anime was the AMV based?
P.S. I don't have any idea about the AMV, neither I know what was the title of it. I saw it on YouTube, is the only information I can give :)
Edit 1: In one of the scenes in AMV, the girl is shown wandering through streets (her clothes were torn and old). The anime appeared to be quite tragic.