The building looks like this
And the view?
And just what is the history of the Duomo?
During the 13th century, it was a rich city thanks to the local guilds and it was looking to show off. At the time the wool guild was new and ready to show off its prowess. This is why the government at the time entrusted them with the undertaking of creating this cathedral. Immense in its size and fortitude, it was started in 1296 by Arnolfo di Cambio but in total the cathedral took over a hundred and forty years to finish. The date of consecration was March, 1436. – See more at: http://www.italymagazine.com/featured-story/see-florence-icon-youve-never-seen-it#sthash.fOXUGcXp.dpuf
And you can book an exclusive tour. This is very cool!