Awwal 26, 1432 / April 30, 2011, SPA -- On behalf of Prince Salman bin Abdulaziz, Governor of Riyadh Region, Undersecretary of the Governorate of Riyadh Region Dr. Nasir Aldaood attended here today a ceremony held by the Netherlands's embassy in the kingdom. The event was held on the occasion of the national day of the Netherlands.