The Papal Basilica of Saint Peter in the Vatican or simply Saint Peter's Basilica is a church built in the Renaissance style located in Vatican City, the papal enclave that is within the city of Rome, Italy. It was initially planned by Pope Nicholas V and then Pope Julius II to replace the aging Old St. Peter's Basilica, which was built in the fourth century by Roman emperor Constantine the Great. Construction of the present basilica began on 18 April 1506 and was completed on 18 November 1626.

This Church is spread across an interior area of 15,160 square meters. Its magnificent dome is about 136 m high. It is the largest Cathedral in the world and is very significant in Roman catholicism. The church can host more than 20000 people at once. There are more than 100 tombs in this Church and there is a holy door that is only opened during the holy years.

Area: 15,160 Square Meters

Location: Vatican City

The Cathedral Basilica of the National Shrine of Our Lady Aparecida is a prominent Roman Catholic basilica in Aparecida, Brazil. It is dedicated to Our Lady Aparecida as the principal Patroness of Brazil. Nossa Senhora Aparecida roughly translates to Our Lady Revealed It is the largest cathedral and the second largest Catholic church in the world in the interior area after the St. Peter's Basilica in the Vatican City.

The internal space of this church is 12000 square meters. It is the second-largest church in the world and the most significant Marian pilgrimage site in the nation. Because of its size, it can hold more than 45000 worshipers at once. The church's domes are around 70 meters high, and its towers are 100 and 2 meters tall. The Virgin Mary is also honored in this church.

Area: 12,000 Square Meters

Location: Brazil

Milan Cathedral, or Metropolitan Cathedral-Basilica of the Nativity of Saint Mary (Italian: Basilica cattedrale metropolitana di Santa Maria Nascente), is the cathedral church of Milan, Lombardy, Italy. Dedicated to the Nativity of St Mary (Santa Maria Nascente), it is the seat of the Archbishop of Milan, currently Archbishop Mario Delpini.

It has an interior area of 11,700 square meters. The church consists of 135 spires. There are statues of some of the significant figures from Italian history on top of the spires. The highest spire is the tallest, standing at 108.8 meters. a gilded statue of the Virgin Mary stands on the same surface. The chapel is home to 3400 wonderful statues in total. Its area is so large that 40,000 people can gather there simultaneously. The roof of the church is accessible to guests. The unique fact about the church is that apart from the statues there are also various sculptures and paintings.

Area: 11,700 Square Meters

Location: Italy

The Cathedral of Saint Mary of the See, better known as Seville Cathedral, is a Roman Catholic cathedral in Seville, Andalusia, Spain. It was registered in 1987 by UNESCO as a World Heritage Site, along with the adjoining Alcázar palace complex and the General Archive of the Indies. It is the fourth-largest church in the world (its size remains a matter of debate) as well as the largest Gothic church.

This Church has an interior area of 11,520 square meters. It is located in the Spanish city of Seville. Christopher Columbus is buried in this church, where he spent his final years as a great explorer. The French architect Rouen Cathedral created this church, which was erected on the site of the Almohad mosque. The church's interior is decorated in gold. Surprisingly, there are still a few Almohad mosques standing next to the cathedral.

Area: 11,520 Square Meters

Location: Spain

The Cathedral of St. John the Divine (sometimes referred to as St. John's and also nicknamed St. John the Unfinished) is the cathedral of the Episcopal Diocese of New York. It is at 1047 Amsterdam Avenue in the Morningside Heights neighborhood of Manhattan in New York City, between West 110th Street (also known as Cathedral Parkway) and West 113th Street.

This Church is spread across an interior area of 11241 square meters. It is the biggest Anglican church in the world and is located in New York City. Its height is 183.2 meters. The construction of the church started in 1892. Two renowned African architects, Christopher Grant Lafarge and George Heins were responsible for the church's design. The construction process lasted more than 20 years. The 162-foot-tall dome spans the church. At the church's entryway, there is a picture of Saint John seeing Jesus Christ be transfigured. Some well-known Bible verses may be inscribed on the walls.

Area: 11,241 Square Meters

Location: United States

The Basilica of Our Lady of Licheń is a Roman Catholic church located at the Shrine of Our Lady of Sorrows, Queen of Poland, in the village of Licheń Stary near Konin in the Greater Poland Voivodeship in Poland. It was designed by Barbara Bielecka and built between 1994 and 2004. The construction was funded by pilgrims' donations.

This church has an interior area of 10,090 square meters. With a tower measuring 141.5 meters in height. You must travel to the Polish city of Konin to see this Church. There are 33 steps leading up to the church when you enter the building. The early years of Jesus Christ are represented by these 33 steps. In addition, the church features 52 entrances, 12 columns, and 365 windows. These things symbolize the days in a year, months in a year, and weeks in a year.

Area: 10,090 Square Meters
Location: Poland

Liverpool Cathedral is the Cathedral of the Anglican Diocese of Liverpool, built on St James's Mount in Liverpool, and the seat of the Bishop of Liverpool. It may be referred to as the Cathedral Church of Christ in Liverpool (as recorded in the Document of Consecration) or the Cathedral Church of the Risen Christ, Liverpool, being dedicated to Christ 'in especial remembrance of His most glorious Resurrection'.

The internal space of this church is 9687 square meters. In the UK, it is the biggest and longest church. When it comes to height, it stands at 101 meters. This Church's work began in 1904 and was ultimately finished in 1978. There are more than 10,000 pipes inside the construction, which has a multicolored interior. The grand organ, which is located in Liverpool Church, is the biggest operating organ in the world.

Area: 9,687 Square Meters

Location: United Kingdom

The Basilica of the Holy Trinity is a Roman Catholic church and minor basilica in the Sanctuary of Fátima (Marian Shrine of Our Lady of Fátima) in Cova da Iria, in the civil parish of Fátima, in the municipality of Ourém in Portugal. In 2009 it received the Outstanding Structure Award by the International Association for Bridge and Structural Engineering. IABSE awards the most remarkable, innovative, creative, or otherwise stimulating structure completed within the last few years.

This church was constructed by the Greek architect Alexandros Tombazis, and it took three years to build it entirely. With its oval form, this church has a very distinctive design. It has an interior footprint of 8700 square meters. It's interesting how big this church is - it can hold up to 9,000 people at once.

Area: 8,700 Square Meters

Location: Portugal

The Papal Basilica of Saint Paul Outside the Walls, commonly known as Saint Paul's Outside the Walls, is one of Rome's four major papal basilicas, along with the basilicas of Saint John in the Lateran, Saint Peter's, and Saint Mary Major, as well as one of the Seven Pilgrim Churches of Rome.

The Neo-classicist addition of the 19th-century rebuilding is the covered portico (or narthex) that comes before the façade. The Holy Door, which is only opened during the Jubilees, is on the right. A second door, known as the Byzantine door, is located inside the basilica and dates to before the nineteenth century. It was commissioned in 1070 by Pantaleone, the Amalfi Consul in Constantinople, and is thought to have been cast there. Numerous events in the lives of Christ and the apostles are depicted. The new basilica has maintained the original structure with one nave and four side aisles. It is 131.66 metres long, 65 metres wide, and 29.70 metres high, the second largest in Rome.

Area: 8,515 Square Meters

Location: Italy

The Cathedral-Basilica of Our Lady of the Pillar is a Roman Catholic church in the city of Zaragoza, Aragon (Spain). The Basilica venerates Blessed Virgin Mary, under her title, Our Lady of the Pillar praised as "Mother of the Hispanic Peoples" by Pope John Paul II. It is reputed to be the first church dedicated to Mary in history.

The Argon community runs this church. The earliest version of this church was constructed in the 17th century. However, the construction of this church wasn't finished until the 20th century. The church is spread across an interior area of 8318 square meters. In the holy chapel, there is a 15-inch-tall figure of the Virgin Mary. Currently, this is Spain's most frequented church.

Area: 8,318 Square Meters

Location: Spain