Thirty-drachma coin of 1963, commemorating the centennial of the reign of the House of Glcksburg. Clockwise from the top: Paul, George II, Alexander, Constantine I and George I. (Source)
2 rigsdaler - death of Frederik VII and accession of Christian IX marking the transfer of the throne to the Glucksburg branch of the House of Oldenburg[6] (Source)
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Glcksburg Castle, with the Flensburg Firth (separating Denmark and Germany) in the background (Source)