“We had to turn this occasion into an opportunity to make it even more accessible and usable by the public through special routes that would bring visitors into direct contact with the mosaics,” Samuele Caciagli, the architect in charge of the restoration site, said.
In an interview with The Associated Press, Caciagli called the new scaffolding tour of the baptistry vault “a unique opportunity that is unlikely to be repeated in the coming decades.”
The scaffolding platform sprouts like a mushroom from the floor of the baptistry and reaches a height of 32 meters (105 feet) from the ground. Visits are set to start Feb. 24 and must be reserved in advance.
The octagonal-shaped baptistry is one of the most visible monuments of Florence. Its exterior features an alternating geometric pattern of white Carrara and green Prato marble and three great bronze doors depicting biblical scenes.
Inside, however, are spectacular mosaic scenes of The Last Judgment and John the Baptist dating from the 13th century and created using some 10 million pieces of stone and glass over 1,000 square meters of dome and wall.
The six-year restoration project is the first in over a century. It initially involves conducting studies on the current state of the mosaics to determine what needs to be done. The expected work includes addressing any water damage to the mortar , removing decades of grime and reaffixing the stones to prevent them from detaching.
“(This first phase) is a bit like the diagnosis of a patient: a whole series of diagnostic investigations are carried out to understand what pathologies of degradation are present on the mosaic material but also on the whole attachment package that holds this mosaic material to the structure behind it,” Beatrice Agostini, who is in charge of the restoration work, said.
The Baptistry of San Giovanni and its mosaics have undergone previous restorations over the centuries, many of them inefficient or even damaging to the structure. During one botched effort in 1819, an entire section of mosaics detached. Persistent water damage from roof leaks did not get resolved until 2014-2015.
Roberto Nardi, director of the Archaeological Conservation Center, the private company managing the restoration, said the planned work wouldn’t introduce any material that is foreign to the original types of stone and mortar used centuries ago.
“It is a mix of science, technology, experience and tradition,” he said.
The origins of the baptistry are something of a mystery. Some believe it was once a pagan temple, though the current structure dates from the 4th or 5th centuries.
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