From Wikipedia
Great Artists of the Italian Renaissance
Lecture Four
Donatello and Luca della Robbia
Donatello (Donato di Niccolò di Betto Bardi; c. 1386 – December 13, 1466) was a famous early Renaissance Italian artist and sculptor from Florence. He is, in part, known for his work in bas-relief,
a form of shallow relief sculpture that, in Donatello's case,
incorporated significant 15th century developments in perspectival
illusionism.
From Wikipedia
Luca della Robbia (1400–1482) was an Italian sculptor from Florence, noted for his terra-cotta roundels.
Luca Della Robbia developed a pottery glaze
that made his creations more durable in the outdoors and thus suitable
for use on the exterior of buildings. His work is noted for its charm
rather than the drama of the work of some of his contemporaries. Two of
his famous works are The Nativity, circa 1460 and Madonna and Child, circa 1475. He is the first of a dynasty of important pottery artists: Andrea della Robbia (his nephew) and Giovanni della Robbia (his grandnephew, son of Andrea).
Della Robbia was praised by his compatriot Leon Battista Alberti for genius comparable to that of the sculptors Donatello and Lorenzo Ghiberti, the architect Filippo Brunelleschi, and the painter Masaccio.
By ranking him with contemporary artists of this stature, Alberti
reminds us of the interest and strength of Luca's work in marble and
bronze, as well as in the terra-cottas always associated with his name.