The main hall with the central dome accommodates over 6500 persons. The total capacity of the whole complex is 20,000 persons. It comprises the main hall, the women's hall, social halls and a library with 20,000 books. The Sultan Qaboos Mosque occupies an area of 416 , 000 m2. It is built on an elevated site in accordance with the tradition of Omani mosques. The interior is tiled with white and gray marble. The interior arches and blind niches are decorated with ceramic floral patterns. The Persian rug in the main hall weighs 21 tons. It comprises 1, 700, 000 knots. The size of the rug is 70 x 60 m, thus it is the largest finished carpet in the world. It was created with use of traditional materials and techniques.