This project concerns the collection of information about UFO-like events or phenomena happenend in Italy before 1900. It is undoubtedly difficult to find, check and verify the original sources, and it is equally difficult to define the distinctive features of the phenomena. This notwithstanding it has been possible to determine some simple criteria of analysis for a first processing phase of data, building a specific database of 125 entries, similar to the others coordinated by CISU. To all practical purpose, the PRE-UFO catalogue is a part of FORTCAT.