Because of the vicissitudes of historical transmission, eventually no less than four Sasanian rulers were quoted as its builders: Shapur I (241–273), Shapur II (310–379), Khosrau I Anushirvan (531–579) and Khosrau II Parvez (590–628).Kurz, Otto The Journal of the Royal Asiatic Society of Great Britain and Ireland, 73, 1, 1941, pàg. 37–41. JSTOR: 25221709.