Under the patronage of the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud, the opening ceremony of the National Unity Conference will be held tomorrow at Riyadh-based Imam Mohammed bin Saud Islamic University. However, the official sessions of the three-day event, which is held under the theme \"\"National Unity, its Invariabilities and Values\" have already commenced in the morning of this Monday. In a statement to highlight the event, Dr. Sulaiman Abalkhail, Rector of the university, said it is the duty of the university towards its society to expose and further strengthen the values and pillars of the national unity of the continent-like country, an issue he said remains among the priorities of the monarch.