Luxembourg was the smallest of the 51 founding members of the United Nations when it signed the UN Charter in San Francisco on 26 June 1945. Since then, the grand duchy has made significant contributions to the UN. For instance, prime minister Gaston Thorn presided over the 30th session of the General Assembly in 1975.

Luxembourg also acted as vice-president of the 58th session of the General Assembly from September 2003 to September 2004 and in October 2012 it was voted to a non-permanent seat on the Security Council, which it maintained from 2013 to 2014. Next year, it will be running for a seat on the Human Rights Council, which will be voted in October 2021.

In 1988, Luxembourg also gifted the famous “knotted gun” sculpture, officially titled “Non-Violence”, by Swedish artist Carl Fredrik Reuterswärd to the UN.

As well as the Chamber of Deputies, Luxembourg City hall and the foreign office (which issued this tweet) were also illuminated in blue on Saturday evening.