An artist creates a bust of the Persian poet and mystic Attar Neyshaburi (1145-1221) in front of his tomb in the northeastern Iranian city of Neyshabur on April 13, 2016, to celebrate Attar National Day. (IRNA/Morteza Aminorroayai)

An artist creates a bust of the Persian poet and mystic Attar Neyshaburi (1145-1221) in front of his tomb in the northeastern Iranian city of Neyshabur on April 13, 2016, to celebrate Attar National Day. (IRNA/Morteza Aminorroayai)