An unresolved rivalry between Eric V and the adherents of the former king of Denmark, Abel, forces Margaret to write Pope Urban IV in 1263, asking him to allow women to inherit the Danish throne.

This would make it possible for one of Eric's sisters to become reigning Queen of Denmark in the event of Erik V's death (he has no children as of yet).

The Pope acquiesces.

(It is never to become an issue, however: Eric's son, named after his uncle, Eric IV "Ploughpenny" will eventually succeed to the Danish throne.)