The establishment of Unction, as well as of other mysteries, It goes back to the New Testament and even the Catholic Letter of James: (Chapter E', lyrics 14 -15).
"The sick among you; proskalesastho the elders of the church ....... "
During the Great was committed Unction,the Reverend Emmanoil Galanakis read seven Gospels and seven Wishes. so blessed oil to which "crossed" the faithful forehead
The anointing oil is considered therapeutic. During the sacrament, the priest lights a candle for each Gospel reading. What do some faithful during the Great Unction, at the church, Holy Wednesday.
The evening took place the ceremony Washbasin, which is the Matins of Holy Thursday referred to the Last Supper and chanted the Hymn "When the glorious disciples".
See images from the sequence of the Grand Unction