For tsunamis, as for all natural phenomena, a careful analysis of the events that occurred in the past is essential to understand the dynamics of the phenomenon and to develop models and scenarios for risk mitigation related to future events. The analysis of past events allows the realization of catalogs, which represent the first step in the hazard assessment of a region. A large amount and variety of historical documentary sources are used for the realization of tsunami databases. In these pages we present the first unified database of Euro-Mediterranean tsunamis (EMTC), was realized, which includes tsunamis occurred in the entire Mediterranean basin, in the Northeast Atlantic, in the North Sea, in the Marmara and Black Seas. EMTC2.0 is currently available. We also present (ITED - Italian Tsunami Effects Database) which provides information on the effects of tsunamis observed along the Italian coasts.