Other forms: seraglios
A seraglio refers to the apartments or rooms where a group of Turkish Muslim women live together, especially if they are a man's wives and concubines. In other words, a seraglio is a harem.
Thanks to Mozart's opera "The Abduction from the Seraglio," this word will always retain a slot in English — despite its being merely an Italian loan from an originally Turkish word meaning "Muslim women's quarters." "The Heist from the Harem" might have been just as good a translation of Mozart's title, but it somehow lacks the dignity we associate with grand opera.