Holy Thursday - Wielki Czwartek
In the days of the monarchy it was a custom for the King and a Bishop to wash the feet of twelve beggars especially chosen for this occasion, symbolizing the spirit of penance, charity, and humility by those in authority.
In the Church of Our Lady of Czestochowa promptly at 4 A.M. the miraculous picture of Our Lady is ceremoniously cleaned, dusted and receives a change of dress.  Religious objects are touched to the picture to impart to them a measure of the picture's supernatural powers.  This is usually a private ceremony conducted in a small chapel at the monastery.
In the parish churches, one of the side altars is elaborately decorated with linens and flowers and prepared for adoration of the Blessed Sacrament.  This altar configures the prison cell in which Christ was kept after His trail.