The Clergy of the Orthodox church are set apart through the Sacrament of Ordination or the "laying-on-of hands" and are divided into three orders:

  1. Deacons
  2. Presbyters or Priest (hiereas)
  3. Bishops (Episkopos)

An Orthodox presbyter is either married (usually serving as a parish priest) or celibate, generally belonging to a monastic order (hieromonachos) called "Archimandrite". Bishops are usually chosen from the ranks of the Archimandrites.

An Orthodox bishop, depending on his jurisdiction and rank, may be called Bishop (usually auxiliary to an Archbishop); Metropolitan (head of a large city or a Diocese); Archbishop (head of an Orthodox country or capital city); Patriarch (head of an ancient or ethnic Church). The bishops of the ancient Sees of Rome and Alexandria are also called Popes. Orthodox clergy of all orders wear the cassock (rasso) in public, but when participating in a church service wear the the vestment of their own order and rank. In some Balkan countries(including Greece) they also wear a black cylinder-like hat (kalimafi) on top of which the celibates (except deacons) wear a black veil dropping down the back (Epanokalimafkon).

The form of address for Orthodox clergy varies according to order, rank, and level of education. The most common forms are the following:

Gr. = Greek        Sl. = Slavonic 

ADDRESSEE'S TITLE FORM OF ADDRESS SALUTATION
1. The Ecumenical
Patriarch of
Constantinople
His All Holiness the Ecumenical Patriarch
Gr. Panagiotatos
Sl. Sviatieishyi

Your All Holiness

Panagiotate
Vashe Sviaschenstvo

2. Other Patriarchs His Beatitude the Patriarch
of ________
Gr. Makariotatos
Sl. Ego Blazhenstvo

Your Beatitude,


Makariotate
Vashe Blazhenstvo

3. Archbishops of independentChurches, Greece, Cyprus, etc. His Beatitude, the
Archbishop of ___
(as above)
4. Archbishops of Crete, America, Australia, England (under  Ecumenical Patriarchate) His Eminence
Gr. Sevasmiotatos,
Sl. Ego Vysoko  Preosviashchenstvo
Your Eminence
Sevasmiotate
Vashe Vysokopreos-
viashchenstvo

5. Metropolitans

(as above) (as above)
6. Titular Metropolitan His Excellency.
Gr. Panierotatos 
Sl. Ego Preosviashchenstvo
Your Excellency,
Panierotate
Vashe
Preosviashscentstvo
7. Bishop The Right Reverend (Rt.  Rev.) Bishop of ____
Gr. Theophilestatos.  
Sl. Preosviashchenyishy Vladyka
Your Grace,


Theophilestate,
Vladyka.
8. Titular Bishop (as above) (as above)
9. Archimandrite The Very Reverend Father.

Gr. Apanosiotatos 
Sl. Otets Protopresvyter 
Gr. Panosiologiotatos
Dear Reverend, or
Dear Father
Panasiotate
Dorogoe
Panasiologiotate
10. Presbyter (Priest)

-married
-married theologian

-celibate
-celibate theologian
Reverend Father 

Gr. Aidesimotatos 
Gr.Aidesimologiotatos 
Sl. Otets Protoierei
Gr. Osiotatos 
Gr. Osiologiotatos
Dear Reverend, or
Dear Father
Aidesimotate
Aidesimologiotate
Uvazhaemyi
Osiotate
Osiologiotate
11. Deacon


-Theologian
Reverend Father

Gr. Evlavestatos
Gr. Ierologiotatos
Sl. Ierodiakon
Dear Reverend, or
Dear Father Evlavestate
Ierologiotate Bogoslov
12. Abbot The Right
Reverend Abbot

Gr. Igoumenos
Sl. Igoumen
Dear Reverend
Father, or Dear
Father
Agie Igoumene
Bogoslov
13. Abbess The Reverend Mother
Superior
Gr. Igoumeni
Reverend Mother

Hagia Igoumeni
14. Monk Brother
Gr. Adelphos
Sl. Monach
Dear Brother
Adelphe
15. Nun Sister
Gr. Adelphi
Sl. Monaschka
Dear Sister
Adelphi
Monashka
16. Spiritual Father Gr. Geron
Sl. Vladyka
Geronta
Vladyka