February 25

Emperor Hadrian formally adopted Antoninus Pius as his son and heir, securing the imperial succession months before his own death.

Tarasios, Patriarch of Constantinople who presided over the Second Council of Nicaea restoring the veneration of icons, died.

Thomas Davenport, a Vermont blacksmith, received U.S. Patent No. 132 for an electric motor, the first American patent granted for such a machine.