Emperor John III Comnenus, crowned in 1182, a grandchild of Emperor John II Comnenus, child of Emperor Andronikos I Comnenus (brother of the failed emperor, Manuel I Comnenus), establishes a clearer line of succession, following primogeniture, after a brief lack of emperor due to a poorly defined line. This allows for a clear Heir Apparent and adds much needed, though only temporary, stability to the Empire.