The centerpiece of the program is the piece "Zilākalna Mesa," formerly known as "Roka Mesa." Currently, the piece is written for organ, synthesizer, and soloist, combining traditional church music with modern musical expressions. The composition is based on traditional parts of the Mass: "Kyrie eleison" or "Lord, have mercy," "Gloria in excelsis Deo" or "Glory to God in the highest," "Credo" or "I believe," "Sanctus" or "Holy," "Benedictus" or "Blessed," "Agnus Dei" or "Lamb of God," and "Pie Jesu" or "Merciful Jesus." The organ part at the concert will be performed by organist Aivars Kalejs, the synthesizer will be played by the composer Mednis himself, and the soloist will be singer Arnita Eglite, who performs in Latvia and Italy.