The official chair or throne of a bishop, or of any person in high authority.

the special chair that a bishop sits in during a church service: The Bishop's Cathedra. The cathedra is sometimes moved to a prominent place for special occasions--as for the conferring of honorary degrees.

The Bishop's raised platform in the middle of the Church, upon which he vests and stands at the begining of the Divine Liturgy.

a throne that is the official chair of a bishop

The bishop's chair, or throne.

Seat of a bishop.

Bishop's throne in back of the Altar. The Amvon is also sometimes given this name.

A cathedra (Latin for "chair") is the chair or throne of a bishop. It is a symbol of teaching authority in the Roman Catholic Church and the Orthodox Church, and has in some sense remained such in the Anglican Communion and in Lutheran churches. Cathedra is the Latin word for a chair with armrests; its Roman connotations of authority reserved for the Emperor were adopted by bishops after the 4th century.