Hadrian (; ; 24 January, 76 AD – 10 July, 138 AD) was Roman emperor from 117 to 138. Hadrian is known for building Hadrian's Wall, which marked the northern limit of Britannia. He also rebuilt the Pantheon and constructed the Temple of Venus and Roma. Philhellene in most of his tastes, he is considered by some to have been a humanist, and he is regarded as one of the Five Good Emperors.