Here are two images of the largest Church in the World, Saint Peter's Basilica, in Rome. The top image is taken from the Sistine Chapel, a Holy Place in which Liturgies do sometimes take place. The bottom image is an image of the interior of Saint Peter's Basilica, of which also prayer services and Liturgies do also take place often too. All this done by the Grace of the Holy Spirit working through the Holy Church, and working through Christians united to Christ.