cathedra

n. official chair (as of university professor); bishop's throne or chair; position or duties of a bishop

A cathedra (Latin, "chair", from Greek, kathedra, "seat") 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. In this sense, it is sometimes referred to as a "bishop's throne." A church into which a cathedra is installed is called a cathedral or co-cathedral — the seat of a  particular church called a diocese.
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n. cathedra, official chair (as of university professor); bishop's throne or chair; position or duties of a bishop

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

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|bishop's chair/throne/office; professor/teacher's chair/office| professorship