Firstly, we discuss if, generally speaking, we can trust the information sources available on the Internet. In fact, the historian has to evaluate the reliability of the source by using the same criteria as the journalist and the documentalist when they search for information. Secondly, we analyse the information provided by the European Union institutions on the Internet, taking into account the potential interests of modern historians. We try to answer the following questions: what is the dissemination policy of the European Union on the Internet? What information services and sources are available? What is the European Union’s position regarding information policy(ies) and research and development, both of which can influence the work of the modern historian?