A development project to reinvigorate Saudi Arabia's Al Tarif neighbourhood was launched by King Salman in Riyadh on Sunday.
The area has been added to the Unesco World Heritage list and is now part of an improvement programme to preserve its historic and cultural importance.
The architectural style uses adobe and traditional Islamic geometric patterns on the buildings. The main building is the citadel which served as the seat of power to Al Saud.
This is part of Saudi Arabia's push to promote its heritage and coincides with plans to increase tourism in the kingdom.
A major government restoration project used original techniques to rebuild the vestiges.
Since 1976, the site has been under the protection of the Saudi government and consists of 28 hectares.
Sheikh Mohammed bin Rashid, Vice President and Ruler of Dubai, was present at the opening, along with other GCC leaders.
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