Question: Benedict Joseph Flaget, who was the Bishop of the Diocese of Louisville, served which Cathedral?

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Anna Maria Taigi: Blessed Anna Maria Taigi (29 May 1769 - 9 June 1837) - born Anna Maria Giannetti - was an Italian Roman Catholic professed member from the Secular Trinitarians.  Taigi married Domenico Taigi who was a brash and impulsive individual though devoted to his wife who experienced a series of ecstasies during her life and was known to have heard the voices of God and Jesus Christ on several occasions.  Taigi became a Secular Trinitarian after experiencing a sudden religious conversion in winter 1790 while at Saint Peter's Basilica and came into contact with a range of cardinals and luminaries which included Saint Vincenzo Strambi and Bishop Benedict Joseph Flaget amongst others.

Roman Catholic Diocese of Kottapuram: The Roman Catholic Diocese of Kottapuram (Latin: "Kottapuramen(sis)" ) is a diocese located in the city of Kottapuram in the Ecclesiastical province of Verapoly in India.  On Saturday, December 18, 2010, Pope Benedict XVI named Joseph Karikkassery, Auxiliary Bishop of the Roman Catholic Archdiocese of Verapoly, as Bishop of Kottapuram.  The diocese had until then been a vacant see (sede vacante), as Bishop Francis Kallarakal had been appointed by Pope Benedict XVI in February 2010 as Metropolitan Archbishop of the Roman Catholic Archdiocese of Verapoly, India (the Diocese of Kottapuram is in its Ecclesiastical Province).  The previous Archbishop of Verapoly had died.

Cathedral Basilica of Christ the King (Hamilton): Cathedral Basilica of Christ the King is a Roman Catholic church in Hamilton, Ontario Canada.  The Cathedral was consecrated on December 19, 1933.  It is the seat of the Bishop of the Diocese of Hamilton, and the cathedral of the Diocese of Hamilton.  The cathedral contains the cathedra (bishop's chair) of bishop the most Rev. Douglas Crosby D.D. OMI.  The cathedral was raised to the status of a minor basilica on February 2013 by Pope Benedict XVI.

Roman Catholic Diocese of Fort Wayne–South Bend: The Diocese of Fort Wayne–South Bend (Latin: "Dioecesis Wayne Castrensis–South Bendensis" ) is a Roman Catholic diocese in north-central and northeastern Indiana.  The Most Reverend Kevin C. Rhoades was appointed diocesan bishop by Pope Benedict XVI on November 14, 2009, and was installed on January 13, 2010.  The Diocese of Fort Wayne–South Bend encompasses 14 Indiana counties: Adams, Allen, DeKalb, Elkhart, Huntington, Kosciusko, LaGrange, Marshall, Noble, Steuben, St. Joseph, Wabash, Wells, and Whitley.  The diocese has a co-cathedral setup with the Cathedral of the Immaculate Conception in Fort Wayne as the primary cathedral and Saint Matthew's Cathedral in South Bend as the associate cathedral.

St. Joseph's Cathedral, Trivandrum: St. Joseph's Metropolitan Cathedral, also known as Palayam Palli is the Roman Catholic Latin Rite cathedral of the Archdiocese of Trivandrum.  The first church was built here in 1873.  The church was intended in the manner of a cross in 1912.  The final stage of extension, including the Gothic style facade and the bell-tower was completed in 1927.  The three bells were brought from Belgium and were named Joseph, Xavier, and Aloysius in honour of St. Joseph, the Patron of the Church, St. Francis Xavier, the Apostle of India and Bishop Aloysius Maria Benziger the pioneer Missionary-Bishop of Quilon respectively.  Upon the bifurcation of the Diocese of Quilon, the new diocese of Trivandrum was formed on 1 July 1937, and St. Joseph’s Church became the cathedral of the newly formed diocese.  When the diocese was raised to a metropolitan archdioese in 2004, the cathedral became a metropolitan cathedral.  The cathedral has a statue of its patron St. Joseph with the child Jesus in the middle of the facade and a statue of Jesus with hands raised atop the tower.  The church which is white in colour was painted red from 1927 to 2010.  It was renovated during the period 2008 to 2010.

Roman Catholic Diocese of Qui Nhơn: The diocese of Qui Nhơn (also referred to as the diocese of Quy Nhơn; Latin: "Dioecesis Quinhonensis" ; Vietnamese: "Giáo phận Qui Nhơn" ) is a Roman Catholic diocese in central Vietnam.  The Bishop is Pierre Nguyên Soan, since 1999; Father Matthieu Nguyen Van Khoi, pastor of Assumption Cathedral in Quy Nhơn and professor at the "Maria Stella" Seminary of Nha Trang, was appointed Coadjutor Bishop-elect of the diocese by Pope Benedict XVI on December 31, 2009.  He will be ordained at a later date; as coadjutor bishop to Bishop Soan, he serves as an auxiliary bishop and vicar general of the diocese but also, by canon law, has the right to automatically succeed him upon his death, retirement, or incapacitation.

Roman Catholic Diocese of Bùi Chu: The diocese of Bùi Chu (Latin: "Dioecesis Buichuensis" ) is a Roman Catholic diocese of Vietnam.  Joseph Hoàng Văn Tiem, S.D.B., was the Bishop of the Roman Catholic Diocese of Bùi Chu from his 2001 appointment by Pope John Paul II until his death in August 2013.  On Christmas Eve, Monday, December 24, 2012, Pope Benedict XVI appointed Auxiliary Bishop Thomas Vu Dinh Hieu, of the Roman Catholic Diocese of Xuân Lôc (a suffragan diocese of the Archdiocese of Saigon, or Ho Chi Minh City), Titular Bishop of Baanna, as the Coadjutor Bishop of the Diocese of Bùi Chu.  He succeeded Bishop Van Tiem who died.

Roman Catholic Archdiocese of Louisville: The Roman Catholic Archdiocese of Louisville consists of twenty-four counties in central Kentucky, US, covering 8124 sqmi .  It is the seat of the Metropolitan Province of Louisville, which comprises the states of Kentucky and Tennessee.  The cathedral church of the archdiocese is the Cathedral of the Assumption.

Basilica of St. Joseph Proto-Cathedral: The Basilica of Saint Joseph Proto-Cathedral is a Catholic parish church at 310 West Stephen Foster Avenue in Bardstown, Kentucky.  It is the former cathedral mother church of the former Roman Catholic Diocese of Bardstown.  During its years as a cathedral, the pastor was Benedict Joseph Flaget, the first Bishop of Bardstown.

Benedict Joseph Flaget: Benedict Joseph Flaget {'1': ", '2': ", '3': 'SS', '4': "} (November 7, 1763 – February 11, 1850) was a French-born Catholic bishop in the United States.  He served as the Bishop of the Roman Catholic Diocese of Bardstown between 1808 and 1839, then as Bishop of the Diocese of Louisville between 1839 and 1850 when the see was transferred to Louisville in 1839.

Supporting paragraphs: Benedict Joseph Flaget Roman Catholic Archdiocese of Louisville
Answer: the Cathedral of the Assumption.