The Basilica of Saint Mary replaced a previous church, the Church of the Immaculate Conception.
 It was originally built in 1871, located at 3rd Street and 3rd Avenue North, but the expanding warehouse district was engulfing the church property.
 Archbishop John Ireland announced plans for a new Church of the Immaculate Conception on Christmas Day, 1903.
 In 1905, Lawrence S. Donaldson donated a one-block parcel on Hennepin Avenue near Loring Park for the new church buildings.
 The design was awarded to Franco-American architect Emmanuel Louis Masqueray, the designer of the Cathedral of Saint Paul.
 Masqueray designed it in a Beaux-Arts style.
 The groundbreaking was held on August 7, 1907, with foundation construction continuing through May 1908.
 The cornerstone was laid on May 31, 1908, with a ceremony involving 30,000 Catholics, twenty bishops, 300 priests and seminarians from the Saint Paul Seminary, and 500 cadets from the College of Saint Thomas.
 As construction on the Basilica and the St. Paul Cathedral progressed, Masqueray's architectural genius attracted attention.
 American Architect magazine commented, "The two Catholic Cathedrals will be -- when completed, noteworthy achievements in church building for any period; in extent and splendor they promise to surpass anything yet attempted in ecclesiastical work in the United States."

Civic dedication of the church took place on November 4, 1913, and the church was informally opened on May 31, 1914.
 It was informally referred to as the Pro-Cathedral of the archdiocese from its beginning, but the parish was still officially named the Church of the Immaculate Conception until September 21, 1921.
 It was formally named the Procathedral of Saint Mary at that time.
 Although the building was open for worship in 1914, the interior decoration, windows, and plaster work were not completed until 1925.
 It was established as a minor basilica by Pope Pius XI in 1926, making it the first basilica in the United States.

In 1941 the basilica was formally consecrated by Archbishop Dennis Dougherty of Philadelphia as part of the Ninth National Eucharistic Congress (which was taking place in Minneapolis and St. Paul at the time).

The building was added to the National Register of Historic Places in 1975.
Its significance is due to three reasons: its excellent architecture and engineering design, as an expression of Baroque influence in church architecture; an example of the history of religious movements in Minnesota; and its place as the first basilica in the United States.

The foundation of the church is of Rockville granite.
 The walls are built of white Vermont granite, with a height of 70 feet (21 m) from the floor to the eave-line.
 The main entrance is a colonnaded portico with two 116-foot (35 m) spires on each side.
 The nave is lighted by five large arched stained glass windows.
 The nave has a barrel vault of 82 feet (25 m), exceeding that of the St. Peter's Basilica by two feet.
 The sanctuary, at the north end of the nave, is topped with a grand dome measuring 40 square feet (3.7 m²) at the base and rising 138 feet (42 m) above the floor.
 Above the dome is a flesche or lantern topped with a bronze cross, measuring another 62 feet (19 m), making the total height 200 feet (61 m) above floor level.
 The marble altar is located underneath a 50-foot-high (15 m) marble-columned baldacchino.

In 1991 its old copper roof was replaced, stopping the water leaks and damage and that were occurring.
 In 2011, after being named one of 25 Twin City finalists, the building was the recipient of a $100,000 preservation grant from Partners in Preservation, chosen through a public vote; the funds were used to repair the narthex and sacristy of the Basilica, and help restore the paint and gold leaf found throughout the structure.
The Basilica of Saint Mary replaced a previous church, the Church of the Immaculate Conception.  It was originally built in 1871, located at 3rd Street and 3rd Avenue North, but the expanding warehouse district was engulfing the church property.  Archbishop John Ireland announced plans for a new Church of the Immaculate Conception on Christmas Day, 1903.  In 1905, Lawrence S. Donaldson donated a one-block parcel on Hennepin Avenue near Loring Park for the new church buildings.  The design was awarded to Franco-American architect Emmanuel Louis Masqueray, the designer of the Cathedral of Saint Paul.  Masqueray designed it in a Beaux-Arts style.  The groundbreaking was held on August 7, 1907, with foundation construction continuing through May 1908.  The cornerstone was laid on May 31, 1908, with a ceremony involving 30,000 Catholics, twenty bishops, 300 priests and seminarians from the Saint Paul Seminary, and 500 cadets from the College of Saint Thomas.  As construction on the Basilica and the St. Paul Cathedral progressed, Masqueray's architectural genius attracted attention.  American Architect magazine commented, "The two Catholic Cathedrals will be -- when completed, noteworthy achievements in church building for any period; in extent and splendor they promise to surpass anything yet attempted in ecclesiastical work in the United States."
Civic dedication of the church took place on November 4, 1913, and the church was informally opened on May 31, 1914.  It was informally referred to as the Pro-Cathedral of the archdiocese from its beginning, but the parish was still officially named the Church of the Immaculate Conception until September 21, 1921.  It was formally named the Procathedral of Saint Mary at that time.  Although the building was open for worship in 1914, the interior decoration, windows, and plaster work were not completed until 1925.  It was established as a minor basilica by Pope Pius XI in 1926, making it the first basilica in the United States.
In 1941 the basilica was formally consecrated by Archbishop Dennis Dougherty of Philadelphia as part of the Ninth National Eucharistic Congress (which was taking place in Minneapolis and St. Paul at the time).
The building was added to the National Register of Historic Places in 1975. Its significance is due to three reasons: its excellent architecture and engineering design, as an expression of Baroque influence in church architecture; an example of the history of religious movements in Minnesota; and its place as the first basilica in the United States.
The foundation of the church is of Rockville granite.  The walls are built of white Vermont granite, with a height of 70 feet (21 m) from the floor to the eave-line.  The main entrance is a colonnaded portico with two 116-foot (35 m) spires on each side.  The nave is lighted by five large arched stained glass windows.  The nave has a barrel vault of 82 feet (25 m), exceeding that of the St. Peter's Basilica by two feet.  The sanctuary, at the north end of the nave, is topped with a grand dome measuring 40 square feet (3.7 m²) at the base and rising 138 feet (42 m) above the floor.  Above the dome is a flesche or lantern topped with a bronze cross, measuring another 62 feet (19 m), making the total height 200 feet (61 m) above floor level.  The marble altar is located underneath a 50-foot-high (15 m) marble-columned baldacchino.
In 1991 its old copper roof was replaced, stopping the water leaks and damage and that were occurring.  In 2011, after being named one of 25 Twin City finalists, the building was the recipient of a $100,000 preservation grant from Partners in Preservation, chosen through a public vote; the funds were used to repair the narthex and sacristy of the Basilica, and help restore the paint and gold leaf found throughout the structure.
Basilica of Saint Mary (Minneapolis)