How Long do souls remain in purgatory?

(by a 19th century Jesuit) St. Louis Bertrand's father was an exemplary Christian, as we should naturally expect, being the father of so great a Saint. He had even wished to become a Carthusian monk …More
(by a 19th century Jesuit)
St. Louis Bertrand's father was an exemplary Christian, as we should naturally expect, being the father of so great a Saint. He had even wished to become a Carthusian monk until he learned that it was
not God's will for him.
When he died, after long years spent in the practice of every Christian virtue, his saintly son, fully aware of the rigors of God's Justice, offered many Masses and poured forth the most fervent supplications for the soul he so dearly loved.
A vision of his father still in Purgatory forced him to intensify a hundredfold his suffrages. He added most severe penances and long fasts to his Masses and prayers. Yet eight whole years passed before he obtained the release of his father.
St. Malachy's sister was detained in Purgatory for a very long time, despite the Masses, prayers and heroic mortifications the Saint offered for her!
It was related to a holy nun in Pampluna, who had succeeded in releasing many Carmelite nuns from Purgatory, that …More
Dr Bobus
In the Dominican Order houses everyday before dinner pray the De Profundis for the dead of the Order.