The Basilica of the Immaculate Conception in Washington DC is one of the most important pilgrimage centres of the Catholic Church in the USA. At 2360 m ² , it is also one of the largest churches not only in the USA, but in the Americas. It does not lack Polish accents. The most important is the wall painting and mosaic "Christ Pantocrator" by Jan Henryk Rosen in the apse of the nave. This Warsaw-born, French-raised artist, who debuted in 1923 at Warsaw's Zachęta Gallery, resided in the USA from 1937, where he left behind numerous works, many of which are found in churches. Washington also has another of his works in the National Cathedral. Among the Polish monuments in the basilica, a special place is given to the Polish chapel (1964) dedicated to Our Lady of Czestochowa. It contains, among other things, a copy of the painting of Our Lady of Czestochowa, tapestries depicting the baptism of Mieszko I the proclamation of Mary as Queen of Poland by King Jan Kazimierz in 1956.