The Harpa Dei Choir is made up of four siblings, both in blood and in spirit: Nikolai, Lucia, Marie-Elisée and Mirjana Gerstner.
Born in Germany, they grew up in Ecuador, in South America.
All four have as their spiritual foundation the long formation they have received in a religious community of Catholics.
Since 2011, as part of a peace initiative, the siblings have been called to evangelization through Sacred Music.
In this video they sing the "Rorate caeli" or "Rorate coeli" 'Drop down, ye heavens')are the opening words of Isaiah 45:8 in the Bible. The text appears at several points in the Christian liturgy during Advent.
The text is used frequently both at Mass and in the Divine Office during Advent, as it gives exquisite poetical expression to the longings of Patriarchs and Prophets, and symbolically of the Church, for the coming of the Messias. Throughout Advent it occurs daily as the versicle and response at Vespers. For this purpose the verse is divided into the versicle, "Rorate coeli desuper et nubes pluant justum" (Drop down dew, ye heavens, from above, and let the clouds rain the just), and the response: "Aperiatur terra et germinet salvatorem" (Let the earth be opened and send forth a Saviour").