For ten points, name these Islamic places of worship, the holiest of which encircles the Ka'aba.
China's oldest one of these structures is its "Great" one in Xi'an, while the largest one in India is the "Jama" one. Iwans often form the entrances of these buildings, which usually have a wudu area where people wash themselves before performing (*) salat. At least one man from every community is required to stay in one of these structures for ten days in the practice of I'tikaf, which is observed during a holiday that ends with Eid Al-fitr. The mihrab is a hole in these structures' qibla wall, which shows the direction of prayer. Muezzins call the azan from minarets in these buildings, while imams lead prayers in them. For ten points, name these Islamic places of worship, the holiest of which encircles the Ka'aba.
China's oldest one of these structures is its "Great" one in Xi'an, while the largest one in India is the "Jama" one.
Mosque [accept Masjid] &lt;AG&gt;