The unity of the Realm is acted out in the principle of "The Unity of the Realm". This principle is derived from Article 1 of the Danish Constitution which specifies that constitutional law applies equally to all areas of the Danish Realm. The Constitutional Act specifies that sovereignty is to continue to be exclusively with the authorities of the Realm (the Danish government and parliament). Faroese or Greenlandic self-governance cannot be established by international treaties but must be established by Danish law; the Danish parliament (the Folketing) delegates a precisely defined part of its competence to the home rule authorities. The language of Denmark is
The History of Parliament (in 41 separate volumes containing over 20 million words); research work on the remaining periods and on the House of Lords is ongoing. In 2011 the completed sections were republished on the internet. The publication in 1878–79 of the "Official Return of Members of Parliament", an incomplete list of the name of every Member elected to serve in lower Houses of Parliaments in the United Kingdom and predecessor states, gave a useful source on which Victorian historians could build, and there were several publications which identified and gave some biographical and genealogical details of the Members of Parliament for certain