© Istockphoto|  L'esagono: Grammichele, Catania

© Istockphoto| La scacchiera: Torino

© Istockphoto| La stella: Palmanova

© Istockphoto| L'Ominide: Centuripe, Enna 

© Istockphoto| Il cerchio: Locorotondo, Bar

© Istockphoto| La pianta radiale: Milano 

© Istockphoto| La città lineare: Volgograd 

© Istockphoto|Il dedalo medievale: Sorano, Grosseto

© Istockphoto|  La fantasia: Palm Jumeirah, Dubai  

© Istockphoto| Quadrati e triangoli: l’Ensanche di Barcellona