Brunswick-Herzberg and Osterode

YEAR	DATE	EVENT	HEAD OF STATE
1322		Duchy - dinasty Brunswick-Este	duke Guglielmo
1360			duke Federico
1421			duke Ottone
1452			duke Alberto III
1485			duke Filippo I duke of Grubenhagen
1551		Duchy of duke of Grubenhagen
1596		Union to Duchy of Grubenhagen