Both the following paintings feature half naked women in harems. A seemingly common theme in the Orientalism genre. Not that I'm complaining about this. The first is titled Pool in a Harem and is by the French artist Jean-Léon Gérôme. The second is titled Murder in the Seraglio and is by another French artist, this time the painter Fernand Cormon.
(Pool in a Harem - Jean-Léon Gérôme)
(Murder in the Seraglio - Fernand Cormon)
It may refer to a wall or structure for containment, for example of caged wild animalsWhich would tend to suggest that some of these paintings portray a romanticised image of what was in reality no doubt a much more brutal world of sexual slavery. Still the artwork is very beautiful.