Romanesque

One very famous romanesque styled piece of architecture is the Cattedrale di Santa Maria del Fiore of Florence, Italy. The building sit in the center of Florence and was finished being built in 1436. The cathedral has a large dome at the top of it that was designed by engineer Filippo Brunelleschi. The exterior of the building is covered in green, pink and white marble slabs connected to brick. The cathedral is made of three separate buildings and stretches 502 ft and is 376 ft tall at the highest point. 

Designed much like the Pantheon the done of the cathedral is very large but has no opening.  Designer Brunelleschi had trouble figuring out how he could get such a large structure to stand freely. He decided to build with brick rather than stone in order for it to be light enough. The shell was then made of sandstone in marble.

extra credit: https://www.khanacademy.org/humanities/renaissance-reformation/early-renaissance1/sculpture-architecture-florence/v/brunelleschi-dome-of-the-cathedral-of-florence-1420-36