Filled with the joy of spring, we are celebrating a great Polish holiday whose origins date back to the 18th century. It marks the anniversary of the Constitution signed on the 3rd of May 1791 also known as the Government Act or the Constitution of 3 May. It was Europe’s first and the world’s second modern act of this type and a truly momentous piece of legislation. Its adoption by the Great Sejm of the Polish-Lithuanian Commonwealth held in Warsaw was a historic breakthrough. The legacy of the Constitution, the idea of a political system it contains as well as its liberating and democratic message all make an important contribution to European heritage.