Maybe not even people from Pistoia know it but we have after Rome with Saint Peter & Florence with The Brunelleschi Dome , The third biggest dome.
At The present under rennovation works it is in the historical center and just in Via della Madonna .
The sanctuary was founded in 1495 and became The most important stop in Pistoia for pilgrims .
The intitial project Of The Dome was by Giuliano Sangallo architect , after Ventura Vitoni continued The works but Giorgio Vasari from Arezzo finished it in about 1522.( same Who projected The Vasarian corridor in Florence !)
Great example Of Renaissance period in Tuscany .