> The technique to construct an unreinforced concrete dome was lost in Italy until the diligent research of Filippo Brunelleschi So... I was curious what techn

> The technique to construct an unreinforced concrete dome was lost in Italy until the diligent research of Filippo Brunelleschi So... I was curious what technique that was, and according to Wikipedia, Florence Cathedral is a brick dome. I would not have expected anyone to use the phrase "unreinforced concrete dome" based on what I've seen on there, and indeed the word "concrete" doesn't appear there once in the article.