Recently, the challenge of making geographic data available for analysis tasks also on the Internet has motivated the development of Web Geographic Information Systems (Web GIS). This term is referred to all the software products and services that allow geographic information to be accessed in different ways, by adopting Web technology. In this paper we describe a Web GIS developed for handling and promoting information about archaeological sites. In particular, the experimented system is one of the goals of a wider research project, resulting from a long term collaboration between the Department of Mathematics and Computer Science and the Department of Cultural Heritage of the University of Salerno. The aim of such a research activity is the development of an information system enabling heterogeneous users to exploit GIS capabilities and Web accessible data. The interaction between the two departments arose from the need of archaeologists who required a working tool that would allow them to manage the collected data in an integrated way that is not affected by any particular a priori interpretation. The prototype has been experimented to build a vectorial representation of Fratte Hill archaeological site (in the area of Salerno) within its physical context that considers all the stratigraphic information and the whole sequence of archaeological deposits. %U http://www.archimuse.com/publishing/ichim03/068C.pdf