The Secretariat General of Prize of Prince Salman Ibn Abdulaziz for Studies and Research of History of Arabian Peninsula at King Abdulaziz Foundation for Archives and Research (Darah) has set a deadline on May 31 for researchers to submit researches for the fourth edition of the Prize this year in the field of political, social and cultural history of Makkah. It called on researchers to submit before the deadline their research works so that the Prize's Scientific Committee assesses the researches for the Higher Committee of the Prize.