The term on-line Virtual Museum, that was first used by Tsichritzis and Gibbs [Tsichritzis, Gibbs 1991], describes a museum designed in the nominal world of a computer and existing in the Internet, giving the visitor the illusion of being present in an actual museum [Mateevitsi et al 2008]. Often this term is referred to digital on line copies of real museums or of their collections.