St. Peter's Cathedral, located in Vatican City, is one of the largest and most renowned churches in the world. It serves as a major pilgrimage site and is a significant symbol of the Roman Catholic Church. The cathedral was originally built over the tomb of Saint Peter, one of Jesus' apostles and the first pope. Construction of the cathedral began in 1506 and was completed in 1626, featuring a stunning Renaissance design by architects like Michelangelo and Bernini. Its iconic dome, which dominates the skyline, is a masterpiece of architecture and offers breathtaking views of the surrounding area.