The textile coverings of the Kaaba are the most sacred objects in Islamic art.[5] A sitara, nearly six metres high, covers the door of the Kaaba and forms part of the kiswah: the textile covering of the building.[5] At 5.75 metres (18.9 ft) by 3.5 metres (11 ft), this is assembled by sewing together four separate textile panels.[4] This sitara is also known as the burqu'.[3] A smaller sitara covers an internal door of the Kaaba, the Bab al-Tawba.[5] Being protected from weathering, this internal sitara is replaced much less frequently.[5] The tradition is also more recent; the earliest documented internal sitara was in 1893.[5] The Maqam Ibrahim (Station of Abraham) is a small square stone near the Kaaba which, according to Islamic tradition, bears the footprint of Abraham.[9] It used to be housed in a structure with its own sitara that was replaced annually.[4] The minbar (pulpit) within the Great Mosque has its own sitara.[4]