President of the European Council the member state holding the semiannually rotating Presidency of the Council of the European Union at any given time. However, since the 2007 Treaty of Lisbon, article 15 of Treaty on European Union states that the European Council appoints a full-time president for a two-and-a-half-year term, with the possibility of renewal once. Appointments, as well as the removal of incumbents, require a double majority support in the European Council. On 19 November 2009, the European Council agreed that its first president under the Lisbon Treaty would be Herman Van Rompuy (European People's Party, Belgium). Van Rompuy took office when the
Prime Minister of Denmark "Council President" (). Carl Christian Hall became the first Prime Minister/Council President to lead a political party (the National Liberal Party). The modern Prime Minister's Office was founded on 1 January 1914, when the Council Presidium was established as a department under the Prime Minister, when it had previously existed as an informal council gathered by the Prime Minister. The title of the Prime Minister changed again in 1918 under the Premiership of Carl Theodor Zahle, becoming titled the "Minister of State" (in-line with its Scandinavian neighbours, Norway and Sweden), which it remains to this day. By the mid-nineteenth century