Emperor Wen of Han (202-157 BC), the fourth emperor of the Han Dynasty, reigned 180-157 BC; personal name 刘恒liúhéng, son of Emperor 刘邦liúbāng. He is known for his benevolent rule and frugal living, which contributed to the period of peace and prosperity known as the 文景之治wénjǐngzhīzhì