15, in the other room.
One curious thing that one notes about della Robbia pottery is its inability to travel.

It was made for the church and it should remain there.

Even in the Bargello, where there is an ancient environment, it loses half its charm; while in an English museum it becomes hard and cold.

But in a church to which the poor carry their troubles, with a dim light and a little incense, it is perfect, far beyond painting in its tenderness and symbolic value.

I speak of course of the Madonnas and altar-pieces.