Question: What is the main church in the town in which Grethe Mathiesen was born?

Context paragraphs:
St. Michael's Church, Old Town, Chicago: St. Michael's Church in the Old Town neighborhood of Chicago is a Roman Catholic church staffed by the Redemptorist order of priests.  The parish was founded to minister to German Catholic immigrants in 1852 with its first wooden church completed that year at a cost of $750 (including the bell).  The building stands at the intersection of Eugenie Street and Cleveland Avenue.  The church was built as a haven for German immigrants who were outcasts in Old Chicago.  In addition, the town's main church, St. Joseph's Church, was overcrowded.  The Redemptorists were invited to administer the parish in 1860 and a large brick church was finished in 1869.  When completed, its tower made it the tallest building in Chicago, a distinction it held until the old Chicago Board of Trade Building was completed in 1885.

Iglesia Mayor de San Pedro y San Pablo: Iglesia Mayor de San Pedro y San Pablo (translated, "Main Church of St Peter and St Paul"; officially, Church of St. Peter and St. Paul and the Grievance; popularly known as, "Main Church") is a church located in San Fernando in the Province of Cádiz, Andalusia, Spain.  It is located in the heart of the city along the Calle Real.

Marienkirche, Wolfenbüttel: The Marienkirche is a main church ("Hauptkirche") in Wolfenbüttel, Lower Saxony, Germany.  The official name of the Lutheran church is "Hauptkirche Beatae Mariae Virginis" (Main church of the Blessed Virgin Mary).  Short common names are "Hauptkirche BMV", or simply "BMV".  It is regarded as the first major Protestant church.  It was commissioned by Henry Julius, Duke of Brunswick-Lüneburg.  Building began in 1608, directed by "Baumeister" .  The portals in the north and south are attributed to .

Grethe Mathiesen: Grethe Mathiesen (born 10 April 1956) is a Norwegian swimmer.  She was born in Kirkenes.  She competed at the 1972 Summer Olympics in Munich, in the women's 100 metre freestyle.

Las Piñas Nature Church: The Las Piñas Nature Church, also known as the Mary Immaculate Parish Church, is a Roman Catholic church located in Moonwalk Village, Talon V in Las Piñas, Metro Manila, Philippines, known for its "nature theme" representing the ideas of then parish priest Fr Pierino Rogliardi and the architectural advocacy of chosen Filipino architect Francisco Mañosa.  When it was built in 1986, it was only capable of accommodating 100 people.  Beside the main church is the San Lorenzo de Manila Chapel, which is a smaller version of the main church, suited for more intimate church gatherings.

Onnuri Community Church: Onnuri Community Church (sometimes stylized OnNuRi Community Church, abbreviated OCC, also called Onnuri, Onnuri Church, and Onnuri Presbyterian Church) is a local church in Seoul, South Korea that was founded by Yong Jo Hah, who died at the age of 65 on August 2, 2011 pastor .  He planted Onnuri Church in 1985 with 12 families with a vision of stirring a vision similar to the Book of Acts.  The main church building and administration housing cost millions of dollars to build and are located in Yongsan District.  Onnuri is one of approximately 25 megachurches in Korea, and is an emerging church, engaging in postmodern modes of evangelism, organizational structure, and leadership.  The church was founded in 1986.  Onnuri took on much of Handong Global University's debt in the mid-1990s when the university was experiencing financial distress.  Onnuri is one of Korea's largest Presbyterian churches.  Onnuri occupies five different church buildings spread out over Seoul, encompassing congregations speaking ten different languages.  Onnuri English Ministry, spread out over three different church buildings, is the largest English-language Presbyterian ministry in Korea, employing seven part-time pastors and four full-time pastors.  The church's first evangelism conference was held in 2003.  By 2006, 46,000 adults were registered church members, 41,500 of which were in regular attendance of Sunday church services.

Hammerfest Church: Hammerfest Church (Norwegian: "Hammerfest kirke" ) is the main parish church in Hammerfest Municipality in Finnmark county, Norway.  It located in the town of Hammerfest.  The church is part of the Hammerfest parish in the Hammerfest deanery in the Diocese of Nord-Hålogaland.  The church is the main church of the deanery.  The stone/concrete church was built in 1961 by the architect Hans Magnus.  The church seats about 525 people.

St Mary's, Dublin (chapel of ease): St Mary's Chapel of Ease, also known as "The Black Church", is a former chapel in Dublin, Ireland.  Now deconsecrated, it was a church of the Church of Ireland located on St Mary's Place, Broadstone, Dublin.  It is constructed from local calp limestone which takes on a dark hue when wet.  This is the origin of the building's nickname.  A chapel of ease is a church building, other than a parish church, that is located within the bounds of a parish for the convenience of those who cannot conveniently reach the main church.  The parish's main church, now also deconsecrated, was St Mary's on Mary Street.

Alta Church: Alta Church (Norwegian: "Alta kirke" ) is a parish church in Alta Municipality in Finnmark county, Norway.  It is located in the Bossekop area in the town of Alta.  The church is part of the Alta parish in the Alta deanery in the Diocese of Nord-Hålogaland.  The white wooden church was built in 1858 and was consecrated by the Bishop Knud Gislesen.  The architect was Stephen Henry Thomas.  The church seats about 230 people.  It was the main church for the municipality until 2013 when the Northern Lights Cathedral was built as the new main church for the municipality and deanery.

Kirkenes:    (, Kven: "Kirkkoniemi" , Russian: Киркенес , Finnish: "Kirkkoniemi" ) is a town in Sør-Varanger Municipality in Finnmark county, in the far northeastern part of Norway.  The town lies on a peninsula along the Bøkfjorden, an arm of the large Varangerfjorden.  The main church for Kirkenes is Kirkenes Church, located in the Haganes area of the town.

Supporting paragraphs: Grethe Mathiesen Kirkenes
Answer: Kirkenes Church