The VIRTUAL ITALY project is aimed at the production of a four-dimensional model of Italy, where the fourth dimension is time. This project will provide for an ultravision channel where the three-dimensional model of Italy will be freely explorable in Internet with a normal personal computer. It will be possible to travel back in time while elements of the environment will change accordingly, a sort of virtual time machine. It will be the first time an entire country is modeled in 3D with time exploration. If we remember that Italy holds half of the cultural heritage of the world, the enormous cultural value of the project becames evident. Thanks to the Ultramundum patented technology the Virtual Italy model will be the first to be available on the Internet in interactive 3D with high details. Traditional 3D techniques require long download times or CD-Rom distribution, while this new technology will provide a live interactive model everywhere on the planet at high speed. The platform will be enriched in time with new multimedia elements, creating a sort of four-dimensional encichlopaedia of Italy. An high volume of traffic is expected, making the product extremely interesting for sponsors and people wanting to insert their names in one of the biggest collection of masterpieces of mankind. For more details, visit the project's site.