Kathedra Petri
Kathedra Petri (also in the Latin notation with C) stands for:
- the cathedra (chair) of the Pope in the Lateran Basilica
- Kathedra Petri (festival) , also "Petri Stuhlfeier", a festival of the Roman Catholic Church
- Cathedra Petri (work of art) , a reliquary in the form of a throne replica in St. Peter's Basilica