Al Kathiri Palace (Seiyun) is a true architectural gem of Yemen, rising in the heart of historical Saywun. The former residence of the sultans of the Kathiri dynasty, this majestic structure is recognized as one of the largest and most impressive mud-brick buildings in the world, embodying the grandeur and prosperity of the ancient Hadramaut Valley.

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The uniqueness of the site lies in the masterful use of saman — sun-dried clay bricks perfectly adapted to the hot desert climate. Snow-white facades, massive corner towers, and elegant carved windows create the unique look of a "mud skyscraper" that once controlled the legendary incense trade routes.
Today, the palace is open to the public as a museum, offering guests a chance to discover the rich cultural heritage of the region. Inside, you can see traditional interiors, antique furniture, and the everyday items of the rulers, while the building itself fits harmoniously into the Yemeni landscape, surrounded by lush date palm oases.