Church of the Immaculate Conception The predecessor to the Basilica of Saint Mary was the Church of the Immaculate Conception. It was dedicated in 1871 on 3rd Street and 3rd Avenue North in Minneapolis. At that time, Minneapolis was part of the Diocese of Saint Paul and the cathedral for the diocese was the
third Cathedral of Saint Paul in St. Paul. Ireland decided to award the design contract for St. Mary's to the Franco-American architect
Emmanuel Louis Masqueray, who was also designing the new
Cathedral of Saint Paul. Masqueray decided to use a
Beaux-Arts style for the pro-cathedral. The groundbreaking for the Pro-Cathedral of Saint Mary was held on August 7, 1907, with foundation construction continuing through May 1908. The
cornerstone for the new pro-cathedral was laid on May 31, 1908; the ceremony included 30,000 participants, 20 bishops, 300 priests and seminarians from the
Saint Paul Seminary, and 500 cadets from the
College of Saint Thomas in St. Paul.
Pro-Cathedral of Saint Mary The Pro-Cathedral of Saint Mary held its first mass on May 31, 1914. However, the interior decoration, windows, and plaster work were delayed due to the American entry into
World War I in 1917.In 1941, the basilica was formally
consecrated by Archbishop
Dennis Dougherty of Philadelphia as part of the
Ninth National Eucharistic Congress in Minneapolis and St Paul.
Basilica Co-Cathedral of Saint Mary Pope Paul VI changed the Archdiocese of Saint Paul to the Archdiocese of Saint Paul and Minneapolis in 1966. At this point, the Basilica of Saint Mary officially became the Basilica Co-Cathedral of Saint Mary. The basilica was added to the
National Register of Historic Places in 1975. In 2020, the basilica received minor fire damage during the protests over the murder in Minneapolis of
George Floyd that year. Two pews were splashed with
flammable liquid and set on fire.The archdiocese in April 2026 began a $45 million restoration of the main worship area of the basilica that would limit its use for the next 12 months. The plan included the replastering of walls, the restoration of all the pews and the cleaning of bricks and stained glass windows. == Basilica exterior ==