This is a small chapel in The Basilica of the National Shrine of the Immaculate Conception, which is a large Catholic minor basilica and national shrine located in Washington, D.C., United States, on 400 Michigan Ave NE, Washington, DC 20017, adjacent to the Catholic University of America. This chapel has a mosaic of Pope Pius XII bowing before the Virgin Mary. A quote from Pope Pius XII above the image reads: "We consecrate ourselves forever to your immaculate heart."
The Basilica of the National Shrine of the Immaculate Conception is the largest Roman Catholic church in the United States and in North America, and one of the largest in the world. The basilica is also the tallest habitable building in Washington, D.C. Its construction of Byzantine Revival and Romanesque Revival architecture began on September 23, 1920, with renowned contractor John McShain and was completed on December 8, 2017, with the dedication and solemn blessing of the Trinity Dome mosaic.