'cube', [mukaʕʕab]) is a proposed architectural project to build a 400-meter (1,300 ft) tall cube-shaped skyscraper in the al-Qirawan district of Riyadh, Saudi Arabia, one of the five neighborhoods of the planned real estate development of New Murabba.

[1][2][3] The massive undertaking was announced by the Kingdom's de facto ruler Crown Prince Mohammed bin Salman on February 16, 2023.

[4][5] The design has been the subject of some criticism for its similarity to the Kaaba at the Masjid al-Haram mosque in Mecca, Islam's holiest shrine.

[6] The interior as currently planned will feature enormous holographic projections aimed at making viewers feel as if they are in different realities, times, and places.

[7] The Mukaab is planned to be the centerpiece of a giant new downtown built within the Saudi capital city of Riyadh called New Murabba.