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View of the east side of the basilica.

Exterior view of the basilica from Mary's Garden which is situated to the North West of the Shrine.

Interior of the main dome (still without its mosaic art).

Interior view of the "Glorification of the Lamb" dome, just past the sanctuary.

The Basilica of the National Shrine of the Immaculate Conception is a prominent basilica of the Catholic Church located in Washington, D.C., honoring the Blessed Virgin Mary as Our Lady of the Immaculate Conception, the Patroness of the United States.

It is the largest Catholic church in America and one of the largest religious structures in the world. Millions of pilgrims from around the country and the world visit the basilica each year. The basilica is located on Michigan Avenue in the northeast quadrant of Washington on land donated by The Catholic University of America. Nearby is the Pope John Paul II Cultural Center.

The church began to be built in 1920 and was completed under Philadelphia contractor John McShain and opened in 1959. It is designated as a National Historic Landmark on the National Register of Historic Places.

The Basilica is the Patronal Catholic Church of the United States, honoring Mary, Mother of God, under the title Immaculate Conception. It is not the cathedral church of the Archdiocese of Washington; the Cathedral of St. Matthew the Apostle serves as church of the Archdiocese. It is accessible on the Metro Red Line via the Brookland-CUA station.

The Basilica is often—and wrongly—said to be the official church of the United States, which it is not. The United States has no official religion; thus, there is no official church. The Basilica is sometimes confused with the Washington National Cathedral, also a National Historic Landmark, which is an Episcopal church chartered by Congress as the National House of Prayer.

The Basilica does not have its own parish community, but it serves the adjacent University, the United States Conference of Catholic Bishops (located down the street), and hosts numerous Masses for organizations of the Church from across the United States. It houses dozens of chapels honoring Mary and reflecting the origins of the Catholic immigrants and religious orders whose generosity erected them. Its Greek-styled interior is crowned with numerous domes decorated in mosaics, similar to the Basilica of St. Mark in Venice, Italy, but much larger. The mosaics feature American renditions of traditional Catholic images.

The exterior of the Basilica is 459 ft. long, 240 ft. wide, and 237 ft. tall to the top of the cross on the dome. [1] The diameter of the main (Trinity) dome of the Basilica is only 7 feet shorter than that of the dome of the United States Capitol.

Among the many works of art, Pewabic Pottery was installed consisting of arches outlined with iridescent Pewabic tile, huge ceramic medallions set in the ceiling, and fourteen Stations of the Cross for the crypt. [2]

In 1792, John Carroll, the bishop of Baltimore and America's first Roman Catholic bishop, consecrated the newly-created United States under the protection of the Blessed Virgin Mary under the title of The Immaculate Conception. In 1847, Pope Pius IX formalized Carroll's acclamation, proclaiming the Immaculate Conception as the Patroness of the United States. In subsequent years, a few priests imagined an elaborate shrine in honor of their country's patroness.

Bishop Thomas Joseph Shahan, the fourth rector of the Catholic University of America proposed the construction of a national shrine to commemorate the Immaculate Conception in the country's capital. Bishop Shahan took his appeal to Pope Pius X on August 15, 1913. Shahan received the pope's enthusiastic support and his personal contribution of $400. Shahan returned to the United States and persuaded the Board of Trustees of the Catholic University of America to donate land at the southwest corner of the campus for his shrine.

In January 1914, Shahan published the first issue of Salve Regina, a newsletter meant to stir enthusiasm for his project. He wrote that the shrine would be a "monument of love and gratitude, a great hymn in stone as perfect as the art of man can make it and as holy as the intentions of its builders could wish it to be." His newsletter was circulated to dioceses throughout the country and financial donations began to pour into Washington. In 1915, Father Bernard McKenna of Philadelphia was appointed by Shahan as first director of the national shrine, bringing the bishop's dream one step closer to reality. Shahan oversaw the construction of the shrine until his death on March 9, 1932. His body is the only one interred at the national shrine.

By 1919, architectural drawings were chosen by Shahan and McKenna for the construction of the national shrine by the Boston firm of Maginnis & Walsh. At first a traditional Gothic architectural style was considered. Bishop Shahan wanted his shrine to be bold and glorious and opted instead for a Byzantine-Romanesque design. Cardinal James Gibbons, archbishop of Baltimore, blessed the foundation stone on September 23, 1920. More than 10,000 people attended the mass, including foreign ambassadors, United States government officials, military officers, and other dignitaries. In 1929, the Great Depression halted the construction above the crypt level. The beginning of American involvement in World War II stalled plans even further.

After the war, in 1953, American bishops under the leadership of John Noll, archbishop ad personam of Fort Wayne and Patrick O'Boyle, archbishop of Washington, pledged to raise the funds necessary to complete the upper church of the national shrine. On November 20, 1959, thousands of Catholics gathered with their bishops for the dedication of the Great Upper Church.

The crypt has displayed the Papal Tiara of Pope Paul VI since 1968. In 1990, Pope John Paul II named the national shrine as the U.S.'s 36th minor basilica. In August 2006, work was completed on a mosaic covering the Redemption Dome in the Upper Church. This is the first new work to be done in many years and was part of the original architectural plans. Future plans include finishing the intended mosiacs for the Incarnation Dome and the largest of the domes, the Trinity Dome. A small chapel on the crypt level was recently completed honoring Our Lady of La Vang (Vietnam).

• Tiara of Pope Paul VI

• Official website

View of the Apse of the Basilica

View from the Catholic University Mall

Interior view of the Shrine

Founder's Chapel of the Shrine with Bishop Shahan's Tomb

Our Lady of Siluva	View of the Baldachino Altar from the rear	Dome of the Basilica viewed from the East	The Universal Call to Holiness
Exterior viewed from the East	Statue of Pope Saint Pius X	Bishop's Vesting Altar in the Upper Church's Sacristy	Tabernacle in the Blessed Sacrament Chapel