This beautiful rendering of the Hymn of Kassiani (Doxastikon of the Aposticha from the Matins Service of Holy Wednesday in Plagal of the Fourth Mode) was performed live by Nektaria Karantzi in 2016 in Spain at the Cathedral of San Isidoro el Real, set to the music of Konstantinos Priggos.
See also: "I Grew Up With Saint Porphyrios"