An oleograph is a coloured print in imitation of an oil painting.
In the Catholic Church, the Seven Dolours (sometimes known as the Seven Sorrows) are seven tragic events in the life of the Virgin Mary, who is sometimes known as Our Lady of the Seven Dolours.
A popular devotion* amongst Catholics is the practice of saying one Our Father and seven Hail Marys for each of the seven dolours.
In works of art, Our Lady of the Seven Dolours is often represented with seven swords piercing her heart.
* a prayer which is not part of the Catholic Church's liturgy