Ryougi Shiki, Saber, Aozaki Aoko, and Arcueid Brunestud from Type-Moon HD Wallpaper

Four women in formal dresses stand on a grand staircase. One woman in a white dress is in the foreground, facing away from the viewer. Another woman in a blue dress stands behind her, looking at the viewer. Two other women are further up the stairs, one in a white dress and another in a kimono.