What is fonte gaia?

Some articles on fonte gaia:

Piazza Del Campo - Fonte Gaia
... The Fonte Gaia ("Fountain of Joy") was built in 1419 as an endpoint of the system of conduits bringing water to the city's centre, replacing an earlier fountain completed about 1342 when the water conduits ... The white marble Fonte Gaia was originally designed and built by Jacopo della Quercia, whose bas-reliefs from the basin's sides are conserved in the ...
Jacopo Della Quercia - Other Works
... He fled to Siena (and began working on the Fonte Gaia), but his assistant was incarcerated for three years ... The Annunciation to Zacharias because he was working at the same time on the Fonte Gaia and the Trenta Chapel ... Creation of Adam, he uses the same arrangement as in the Fonte Gaia (in Siena), but in reverse order ...