A 15-story-tall wooden sphere inspired by the geometric shapes of Leonardo da Vinci’s studies will alight in Chicago in 2018 to celebrate the 45th anniversary of the sister city relationship between Chicago and Milan, Italy.

The project, which was recently announced at a press reception at the Istituto Italiano di Cultura in Chicago, is being created by il Consorzio Orgoglio Brescia, a consortium of 18 highly specialized Italian companies from the Italian province of Brescia.