[1][2] In 1999, a group headed by Radosław Sikorski, Deputy Minister of Foreign Affairs, launched a campaign to rename the square after Ronald Reagan, President of the United States from 1981 to 1989, as part of the decommunization efforts.

[3] In 2004, a small southwestern section of the square, at the intersection with Waryńskiego Street, was named Pakulski Brothers Alley (Polish: Zaułek Braci Pakulskich).

[4][5] Constitution Square was laid out in 1952 as the central part of a then-constructed housing estate of the Marshal Residential District.

[6][7][8] Originally, the square was envisioned to feature a large fountain at its centre, and to be a final destination of the annual International Workers' Day manifestation marches.

[1] In 1989, in the café Niespodzianka at 6 Constitution Square, the headquarters of the Solidarity Citizens' Committee of Warsaw, which took part in the 1989 Polish parliamentary election, were set up.

[11][12] In the 1980s, it was planned to construct there the Plac Konstytucji station of the M1 line of the Warsaw Metro underground rapid transit system.