The 90th National Saudi Day will be celebrated with a projection of the Saudi Arabian national flag onto the UNESCO World Heritage site At-Turaif, the home of the first Saudi State, on Wednesday 23rd September in Diriyah, Saudi Arabia. This 90th year of Saudi's National Day also marks the first year that the international G20 Summit is to be held in an Arab country. (Photo credit: Diriyah Gate Development Authority).
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