I really didn't know anything about the Della Robbia style or Williamsburg style until I did a little research for this post.
Della Robbia was an Italian male sculptor born circa 1400. In many of his pieces, especially the round ones, he incorporated leaves, flowers, pods, fruits, etc.
In the 1930's a decorator for Colonial Williamsburg, VA was inspired by Della Robbia and decorated wreaths and swags with fruits, berries and so forth in the Della Robbia style.
This centerpiece is based on the Della Robbia and Colonial Williamsburg.
Location Guide:room 2 case 9