Holy Trinity Church is a historic church of the Roman Catholic Archdiocese of Chicago located at 1118 North Noble Street. It is a prime example of the so-called 'Polish cathedral style' of churches, in both its opulence and grand scale. Along with such monumental religious edifices as St. Mary of the Angels, St. Hedwig's or St. John Cantius, it is one of the many Polish churches that dominate over the Kennedy Expressway in the Pulaski Park neighborhood of Chicago.

The Polish Constitution Day Parade in Chicago is the largest Polish parade outside of Poland, and celebrates the anniversary of the ratification of the Polish Constitution of May 3, 1791, which historian Norman Davies calls "the first constitution of its kind in Europe". It is the second in the world only to the United States Constitution.