This photograph is by Marie-Lan Nguyen, who has kindly released it into the public domain. It is free for your use.
Photo by Marie-Lan Nguyen, released into the Public Domain
Organ balcony from the Duomo in Florence.
The organ balcony, or "singers' gallery," was constructed to hold a small chorus. Donatello carved it from marble and incorporated colored glass, completing it in 1439. In 1688, it was deemed too small to accommodate all the singers to perform for the wedding of Ferdinando de' Medici, and it was dismantled and not reassembled until the 19th century. It currently resides in the Museo dell'Opera del Duomo, Florence.