sentences:  Inside, the spiraling internal support serves as a winding 72-step staircase to the top.The Emin Minaret is on the northeast corner of the Uyghur Mosque, a rectangular structure with an iwan or mihrab, a pointed-arch niche enclosed on three sides but open to a large covered courtyard on the fourth.The mosque is divided into an inner hall for use in colder months and larger outer halls for warmer months.