St. Sylvester I became pope in 314. He led the church during the time of Constantine the Great. He sent legates (people appointed as the pope’s personal representatives) to the First Council of Nicaea. Constantine was generous to the church, and St. Sylvester was able to build some of the great churches in Rome, including St. Peter’s Basilica, St. Paul’s and what became known as St. John Lateran. St. Sylvester I died in 335.