According to the Guinness Book of Records, what is the largest Christian church in the world?

The Basilica of Our Lady of Peace of Yamoussoukro in the Ivory Coast celebrated its 25th birthday when it was consecrated by Pope John Paul II on September 10, 1990. According to the Guinness Book of Records, it is the largest Christian church building in the world surpassing St Peter's Basilica with an exterior area of 30,000 m².

The basilica’s form is roughly based on that of Saint Peter’s in Rome, with a dome surmounting a colonnade that is in the form of a Latin cross. The basilica is fronted by a large plaza encircled by two more colonnades. The 272 Doric columns that support the colonnades are made of cement and rise as high as 101 feet (31 meters). The basilica’s gigantic dome dwarfs that of Saint Peter’s and rises to a height of 489 feet (149 meters). The basilica has the capacity to hold 18,000 worshipers, while the esplanade can accommodate a crowd of 300,000.