Great Interregnum

In the Holy Roman Empire, the Great Interregnum was a period of time following the death of Frederick II where the succession of the Holy Roman Empire was contested and fought over between pro- and anti-Hohenstaufen factions. Starting around 1250 with the death of Frederick II, marks virtual end of central authority and acceleration of empire's collapse into independent princely territories. This period saw a multitude of emperors and kings be elected or propped up by rival factions and princes, with many kings and emperors having short reigns or reigns that became heavily contested by rival claimants.