After 3 years of work, I have finally finished my dissertation. I would like to invite you to my doctoral defense about Digital Cities next Wednesday, the 31st March 2010, at 11am in the Aula del Consiglio of the University of Parma. Let me give special thanks to my thesis director prof. Michele Zazzi and all of you who supported this project over the past years. Those of you who can not come, I look forward to seeing you some other time (phisically or virtually).</ENG>