In the United States, the Catholic Church is the largest single Christian denomination and the second-largest religious tradition after Protestantism. As of 2024, an estimated 19% to 22% of the adult
Basilica of the National Shrine of the Immaculate Conception in Washington, D.C., the largest Catholic church in North America
St. Francis Xavier Church in Compton, Maryland, the oldest Catholic church in continuous operation from the Thirteen Colonies
Apotheosis of St. Louis in St. Louis
Portrait of John Carroll, first Catholic bishop of the United States, appointed to the Diocese of Baltimore by Pius VI in 1789.
The Catholic Church, also called the Roman Catholic Church, is the largest Christian church, with an estimated 1.28 to 1.41 billion baptized members worldwide as of 2026. It consists of 24 autonomous
Catholic Church in the United States
…In the United States, the Catholic Church is the largest single Christian denomination and the second-largest religious tradition after Protestantism. As of 2024, an estimated 19% to 22% of the…
St. Peter's Basilica in Vatican City, the largest Catholic church building in the world
The first use of the term "Catholic Church", meaning "universal church", was by the Church Father Saint Ignatius of Antioch in his Letter to the Smyrnaeans in c. 110 AD. Ignatius of Antioch also is credited with the first recorded use of the term Christianity ten years earlier, in c. 100 AD. He died in Rome, with his relics located in San Clemente al Laterano.
A c. 1481–1482 fresco by Pietro Perugino in the Sistine Chapel showing Jesus giving the keys of heaven to Saint Peter
The Last Supper in the Santa Maria delle Grazie Church in Milan, Italy, a late 1490s mural painting by Leonardo da Vinci, depicting the Last Supper of Jesus and his twelve apostles, depicts the final meal of Jesus before his crucifixion and death.