The colonial Venetian Empire starts its great expansion in the late fourteenth century. The CD-ROM “Venice and the Sea” is the narration of the historic events concerning the Serenissima Republic and its marine colonies in Greece, namely Crete, the Peloponnese and the Ionian Islands. This centuries long history was affected by financial and commercial factors, the complicated relations between the Venetian administrators and the various Greek social classes, and by the necessity of defence against the Turkish threat.