 Richard N. Frye believe that the name of the city of Amol is rooted in the word "Amard", which occurs as "Amui" in Middle Persian.According to historical literature, Amol was the capital of Tapuria (modern-day Mazanderan), at least in the period starting from the Sasanian Empire to the Ilkhanate of the Mongol Empire.Strabo mentions the name "Mardi" several times.