The Ordo Rituum Conclavis is a formal liturgical book published by the Office for the Liturgical Celebrations of the Supreme Pontiff.

: Details the solemn procession from the Pauline Chapel to the Sistine Chapel while singing the Veni Creator Spiritus . It includes the text of the solemn oath each cardinal must take to maintain secrecy and follow the rules.

This is the only public rite in the book, celebrated in St. Peter's Basilica before the cardinals enter seclusion. The Veni Creator Spiritus: