In 1887 the Court of Cassation of Rome, which recognized a right of
public use on the private Villa Borghese, stated that the Roman legal experience knew only the principle of «conversion» of the res from private
into public when subject to the public use. Nevertheless, for a specific
kind of things, the ripae fluminis, in the legal sources of the handwritten
tradition it is generally reported the «coexistence» of the private property
with public use. The others epigraphic sources about the «conversion» of
some ripae from privatae into publicae can find justification in the parameter
of the greater «absorbency», in some specific cases, of the public use in
relation to the private property.