What is a Kathisma?

(pi. kathismata) Each of the twenty sections into which the Psalter is divided. Also a short troparion, chanted or read during Matins at the end of each kathisma from the Psalter.

How to Read the Orthodox Psalter

Every Kathisma is divided into three stases; after each of the first two stases the following is said:

Glory to the Father, and to the Son, and to the Holy Spirit; both now and ever, and unto the ages of ages. Amen.
Alleluia, Alleluia, Alleluia. Glory to Thee, O God. (Thrice)
Lord, have mercy. (Thrice)
Glory to the Father, and to the Son, and to the Holy Spirit; both now and ever, and unto the ages of ages. Amen.

But at the end of the whole Kathisma:

Glory to the Father, and to the Son, and to the
Holy Spirit; both now and ever, and unto the
ages of ages. Amen. Alleluia, Alleluia, Alleluia. Glory to Thee, O
God. (Twice) Alleluia, Alleluia, Alleluia. Glory to Thee, O
God our Hope, O Lord, glory be to Thee.

Daily Readings from the Orthodox Psalter

Daily Readings from the Orthodox Psalter During Great Lent