Sheikh Hamid bin Zayed Al Nahayan, Head of the Court of the Heir Apparent of the Emirate of Abu Dhabi, left here tonight after having attended the opening ceremony of the 23rd National Festival for Heritage and Culture. At the airport, he was seen off by Prince Abdulaziz bin Abdullah bin Abdulaziz, Advisor to the King, senior protocol officials and UAE Ambassador to the Kingdom Khamees Mohammed Al-Aklah.