Heribert secretly married Diana against his father's will and when he succeeded to the throne, he was asked to divorce Diana in favor of marrying a princess, but the new king refused. The clerk then decided to note on official documents that their marriage was to then be a morganatic one - that is to say Diana and any children she had with Heribert wouldn't be able to inherit the throne. However Diana skillfully made the mark about the marriage being morganatic into a mere mark with no meaning on the dusty and forgotten document and the couple's son took over without any problems when Heribert passed on.
Heribert was most famous for quarreling with the Chapter of Sorcerers for money by trying to impose a tax on magic and spells and being generally hostile to magic users. This resulted in the mages applying a boycott on Redania, the effects of which were felt long after Heribert's death. A truce was finally called by his son, Vizimir II.