Historical Events Historic Event Feb 25 The Emperor Hadrian adopts Antoninus Pius, effectively making him his successor Roman Emperor Hadrian Roman Emperor Antoninus Pius 135 AD History by Year 141 AD Famous People by their Chinese Zodiac Animal Year of the Rat2020 Year of the Ox2021 Year of the Tiger2022 Year of the Rabbit2023 Year of the Dragon2024 Year of the Snake2025