Interregna

An interregnum is a period between kings. In particular:

• The 1254-1273 period in the Holy Roman Empire between the end of Hohenstaufen rule and the beginning of Habsburg rule.
• The 1332-1340 period in Denmark when the country was mortgaged to a few german counts.
• The 1383-1385 Crisis in Portugal (14th century)
• The 'commonwealth of England' in Britain (17th century)

In some monarchies, such as the United Kingdom, an interregnum is usually avoided due to a rule described as "the king died, long live the king", i.e. the heir to the throne becomes a new monarch immediately on his predecessor's death or abdication. This is not so in other monarchies where the new monarch's reign begins only with coronation or some other formal or traditional event. In the Polish-Lithuanian Commonwealth for instance, kings were elected, which often led to relatively long interregna. During that time it was the Polish primate who served as an interrex (ruler between kings).