of marble and limestone. The interior walls, measuring , are clad with tiled, white marble halfway to the roof, with darker trimmings along the floor. The floor of the interior stands about above the ground area where tawaf is performed. The wall directly adjacent to the entrance of the Kaaba has six tablets inlaid with inscriptions, and there are several more tablets along the other walls. Along the top corners of the walls runs a black cloth embroidered with gold Qur'anic verses. Caretakers anoint the marble cladding with the same scented oil used to anoint the Black Stone outside. Three pillars (some erroneously report two) stand inside the Kaaba, with a small altar or table set between one and the other two. Lamp-like objects (possible lanterns or crucible censers) hang from the ceiling. The ceiling itself is of a darker colour, similar in hue to the lower trimming. The Bāb ut-Tawbah—on the right wall (right of the entrance) opens to an enclosed staircase that leads to a hatch, which itself opens to the roof. Both the roof and ceiling (collectively dual-layered) are made of stainless steel-capped teak wood. Each numbered item in the following list corresponds to features noted in the diagram image. The Ḥajar al-Aswad (), is located on the Kaaba's eastern corner. It is the location where Muslims start their circumambulation of the Kaaba, known as the tawaf. The entrance is a door set above the ground on the north-eastern wall of the Kaaba, called the Bāb ar-Raḥmah (), that also acts as the façade. In 1979, the gold doors made by artist Ahmad bin Ibrahim Badr, replaced the old silver doors made by his father, Ibrahim Badr, in 1942. There is a wooden staircase on wheels, usually stored in the mosque between the arch-shaped gate of Banū Shaybah and the Zamzam Well. The oldest surviving door dates back to 1045 AH (1635–6 CE). The Mīzāb ar-Raḥmah, commonly shortened to Mīzāb or Meezab is a rain spout made of gold. Added when the Kaaba was rebuilt in 1627, after a flood in 1626 caused three of the four walls to collapse. This slant structure, covering three sides of the Kaaba, is known as the Shadherwaan () and was added in 1627 along with the Mīzāb ar-Raḥmah to protect the foundation from rainwater. The Hatīm (also romanized as hateem) and also known as the Hijr Ismail, is a low