The Treaty of Lisbon or Lisbon Treaty (initially known as the Reform Treaty) is an international agreement which amends the two treaties which form the constitutional basis of the European Union (EU). The Lisbon Treaty was signed by the EU member states on 13 December 2007, and entered into force on 1 December 2009. It amends the Maastricht Treaty (also known as the Treaty on European Union) and the Treaty establishing the European Community (TEC; also known as the Treaty of Rome). In this process, the Rome Treaty was renamed to the Treaty on the Functioning of the European Union (TFEU).

Prominent changes included the move from unanimity to qualified majority voting in several policy areas in the Council of Ministers, a change in calculating such a majority to a new double majority, a more powerful European Parliament forming a bicameral legislature alongside the Council of ministers under the ordinary legislative procedure, a consolidated legal personality for the EU and the creation of a long-term President of the European Council and a High Representative of the Union for Foreign Affairs and Security Policy. The Treaty also made the Union's bill of rights, the Charter of Fundamental Rights, legally binding.

...that "Nocturne" is the Eurovision Song Contest winner with the fewest words, the Norwegian language original having only 25?

...that the Eastgate Clock (pictured) in Chester is the second most photographed timepiece in the United Kingdom, after Big Ben?

...that "Kinek mondjam el vétkeimet?" received three perfect scores at the start of voting in the Eurovision Song Contest 1994 before ultimately coming in fourth, making Hungary the only debuting nation to lead the voting?

Budapest's recorded history begins with the Roman town of Aquincum, founded around AD 89 on the site of an earlier Celtic settlement near what was to become Óbuda, and from 106 until the end of the 4th century the capital of the province of lower Pannonia. The Hungarians led by Árpád settled in the territory at the end of the 9th century, and a century later officially founded the Kingdom of Hungary. Research places the probable residence of the Árpáds an early place of central power near what became Budapest. The Tatar invasion in the 13th century quickly proved that defence is difficult on a plain. King Béla IV of Hungary therefore ordered the construction of reinforced stone walls around the towns and set his own royal palace on the top of the protecting hills of Buda. In 1361 it became the capital of Hungary.