His art made him the greatest sculptor of the early Renaissance. He spent his early life in Padua, then his older life in Florence working for Medici.
Donatello actually influenced Michelangelo. Palazzo Vecchio is a palace they stayed in and the Metropolitan Museum built a fountain resembling by Donatello.
In his sculptures, Donatello put so much emotion & effort into his art, influencing other artists to sculpt that emotion & form that way he did.