La Scarzuola is an architectural complex in Umbria, located in Montegiove hamlet in the comune of Montegabbione, Terni Province. It was originally the site of a 13th Century convent associated with St. Francis of Assisi, but was partially abandoned in the 19th Century.
In 1957, the Milanese architect Tomaso Buzzi purchased the convent site and converted it into a multi-faceted architectural complex mainly built with the remains of the convent. Buzzi built the complex as his interpretation of the ideal city.

A visit to La Scarzuola is highly recommended, but you have to make a reservation in advance as it is a private home.
You can make reservation through this reservastion website.

Link to Wikipedia article on La Scarzuola.