
Klaus Dona (born 1949, Jenbach Austria ) is an Austrian independent cultural manager, publicist and exhibition organizer. He has lived in Vienna since 1982 and has been operating an office there since 1987. For years he has devoted himself to researching what he sees as puzzling excavations and discoveries. Among other things, he believes that he can prove the existence of an ancient, global civilization, which among other things built the first pyramids.

The Nephilim are enigmatic figures mentioned in several passages of the Hebrew Bible and later Jewish and Christian literature. They are traditionally associated with extraordinary size, strength, or status, though the biblical texts provide only brief and ambiguous descriptions. Their identity, origin, and role in early biblical history have been the subject of extensive debate among scholars, theologians, and interpreters.
The meaning of the term Nephilim is uncertain. Many translations render the word as "giants," influenced by the Septuagint's use of the Greek term gigantes. Because the biblical text does not define the term explicitly, later Jewish and Christian writings played a major role in shaping the modern understanding of the Nephilim.