Lorenzo Ghiberti’s magnificent bronze doors for the Baptistery of San Giovanni in Florence, Italy.
They were placed on the east entrance. The doors were restored in 1966 and placed in Museo dell’Opera del Duomo. These doors are replicas and the bars are placed to preserve them. They include a self portrait of the sculptor. But, you have to spot it.
There are so many people photographing these massive doors that it is difficult to get a good shot.