The Seven Holy Founders Of The Servite Order - 12 February

Copied from the Roman Catholic Daily Missal, 1962 Angeles Press, page 1123:

Seven noble Florentines founded in 1233 the Cross of Servites of the Blessed Virgin Mary.  The Servites led an austere life, meditating constantly on the Passion of our Lord and venerating the Blessed Virgin as Our Lady of Sorrows.

Quoted below is from Wikipedia [1]:

These seven were: Buonfiglio dei Monaldi (Bonfilius), Giovanni di Buonagiunta (Bonajuncta), Amadeus of the Amidei (Bartolomeus), Ricovero dei Lippi-Ugguccioni (Hugh), Benedetto dell' Antella (Manettus), Gherardino di Sostegno (Sostene), and Alessio de' Falconieri (Alexius). 

...

The Rosary of the Seven Dolors is one of their devotions.

Quoted below is also from Wikipedia [2]:

The Seven Sorrows (or Dolors) are events in the life of the Blessed Virgin Mary that are a popular devotion and are frequently depicted in art.

These Seven Sorrows should not be confused with the five Sorrowful Mysteries of the Rosary. They are often depicted as seven daggers stabbed into her heart.

1. The prophecy of Simeon

2. The flight into Egypt

3. The loss of the Child Jesus in the Temple of Jerusalem

4. Mary's meeting Jesus on the Via Dolorosa (not in the New Testament)

5. The Crucifixion of Jesus on Mount Calvary

6. Jesus is taken down from the cross.

7. The burial of Jesus by Joseph of Arimathea

[1] https://en.wikipedia.org/wiki/Servite_Order, quoted without hyperlinks.

[2] https://en.wikipedia.org/wiki/Our_Lady_of_Sorrows, quoted without references and hyperlinks.