Perikopenordnung
The Roman Catholic Mass Lectionary is the basis for many Protestant lectionaries, most notably the Revised Common Lectionary (RCL) and its derivatives, as organized by the Consultation on Common Texts (CCT) organization located in Nashville, Tennessee. Like the Mass lectionary, they generally organize the readings for worship services on Sundays in a three-year cycle, with four elements on each Sunday, and three elements during daily Mass: