The first projected design of Taq Bostan is designed next to the small arch in years between 379 and 383 AD. This projected design which is called projected design of Ardeshir's coronation is located at the distance of 15 km of Firoz Abad.
This is a famous projected design which is the narrative of coronation ceremony of Ardeshir who is the founder of Sassanid dynasty. In this projected design Ahora Mazda surrenders the sovereignty ring to Ardeshir and Ardeshir stretches his arm toward it.
A child is present behind Ardeshir who is perhaps the crown prince. Three persons of ministers and chiefs of country are been seen in a respectful position after the crown prince.
