His Highness the Amir Sheikh Tamim bin Hamad al-Thani, His Highness the Deputy Amir Sheikh Abdullah bin Hamad al-Thani and HE the Prime Minister and Minister of Interior Sheikh Khalid bin Khalifa bin Abdulaziz al-Thani sent Friday cables of congratulations to Turkish President Recep Tayyip Erdogan on his country's Democracy and National Unity Day.