Shapur II (Middle Persian: 𐭱𐭧𐭯𐭥𐭧𐭥𐭩 Šāhpuhr), also known as Shapur II the Great (Persian: شاپور دوم بزرگ‎‎), was the tenth king of the Sasanian Empire. The longest reigning monarch of the Sassanid dynasty, he reigned from 309 to 379 and was a son of Hormizd II. During his long reign, the Sasanian Empire saw its first golden era since the reign of Shapur I (241–272). His name is sometimes given in English as "Shahpour" or "Sapor".