Assertion: mihrab | /r/HasProperty | octagonal space
Facets:
Source sentences:
text: The mihrab is an octagonal space within the mass of the rectangular projection, separated from the prayer hall by a short corridor that is as wide as one of the room's eight sides.
text: The mihrab is octagonal and is closed by a dome-shaped shell.
text: The mihrab is an octagonal space within the mass of the rectangular projection, separated from the prayer hall by a short corridor that is as wide as one of the room