Helgoland
1100-1807
YEAR
DATE
EVENT
HEAD OF STATE
1100
Danish colony
1807-1890
YEAR
DATE
EVENT
HEAD OF STATE
1807
5 september
UK colony
1890-
YEAR
DATE
EVENT
HEAD OF STATE
1890
9 august
Union to Duchy of Schleswig-Holstein
1945
5 may
UK occupation
1952
1 march
Reunion to Germany
Return to Schleswig-Holstein
Return to Germany
Return to Europe
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