Donatello made two marble statues, St. Mark and St. George, for exterior niches of Or San Michele, the church of Florentine guilds. Below the main sculpture of Saint George is a marble relief showing him slaying the dragon. It is this panel which is of particular interest to us:
In this relief, it seems as if Donatello may have used linear perspective (that is, before Brunelleschi's experiment). However the orthogonals are not so clearly defined that we can decide for certain that he used perspective, or to let us locate a precise vanishing point.
There is no uncertainty, however, about Donatello's use of perspective in his bronze Feast of Herod, shown below.
Donatello, Feast of Herod, 1423-27