The Kaaba is a large masonry structure roughly the shape of a cube. It is made of granite from the hills near Mecca, and stands upon a 25 cm (10 in) marble base, which projects outwards about 35 cm (14 in).[2] It is approximately 13.1 m (43 ft) high, with sides measuring 11.03 m (36.2 ft) by 12.86 m (42.2 ft).[3][4] The four corners of the Kaaba roughly face the four cardinal directions of the compass.[2] In the eastern corner of the Kaaba is the Ruknu l-Aswad "the Black Corner"" or al-Ħajaru l-Aswad "the Black Stone", possibly a meteorite remnant; at the northern corner is the Ruknu l-ˤĪrāqī "the Iraqi corner". The western corner is the Ruknu sh-Shāmī "the Levantine corner" and the southern is Ruknu l-Yamanī "the Yemeni corner".[2][4]
The Kaaba is covered by a black silk and gold curtain known as the kiswah, which is replaced yearly.[5][6] About two-thirds of the way up runs a band of gold-embroidered calligraphy with Qur'anic text, including the Islamic declaration of faith, the Shahada.
In modern times, entry to the Kaaba's interior is generally not permitted except for certain rare occasions and for a limited number of guests. The entrance is a door set 2 m (7 ft) above the ground on the north-eastern wall of the Kaaba, which acts as the façade.[2] There is a wooden staircase on wheels, usually stored in the mosque between the arch-shaped gate of Banū Shaybah and the well of Zamzam. Inside the Kaaba, there is a marble and limestone floor. The interior walls are clad with marble halfway to the roof; tablets with Qur'anic inscriptions are inset in the marble. The top part of the walls are covered with a green cloth decorated with gold embroidered Qur'anic verses. Caretakers perfume the marble cladding with scented oil, the same oil used to anoint the Black Stone outside.
