Mohammad Ali Chamigu said that the institute held the first edition of the competition in 2008 aiming to revive the ancient schools of art and support artists in Islamic-Iranian fields.
He added that the event has been successful in encouraging many of the artists to participate in the competition.
Top artworks are published in a book or put on display at different museums, he noted, according to IRNA.
Chamigu further said that the sideline workshops of the previous editions of the competition were only held in the holy city of Mashhad, but in the sixth biennial, slated to be held later this year, different cities in the country will host 12 workshops planned to be led by eminent experts of illumination.
The dates for registering at the sixth edition of the national competition will be announced in the near future and top works presented in the category of traditional tile designing will be used at the holy shrine of Imam Reza (AS), he went on to say.