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In page Saadian Tombs:

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Lalla Masu'da's chamber connects to the large rectangular chamber to the south through a doorway crowned by an intricate stucco arch with muqarnas intrados (inner surfaces of the arch), which in turn is surrounded by some of the highest-quality stucco carving.[1] The upper walls of this chamber are mostly bare but the lower walls feature zellij tilework with even more complex 16-sided star patterns.[1] The chamber is covered by a berchla roof (a Moroccan wooden framework ceiling with particular stylistic geometric arrangements) with remnants of its former colours.[1] The floor is covered in tilework again along with various tombs. The chamber measures 10 by 6 meters.[1]:196