St. Dorothea of Montau, recluse, born at Montau, 6 February, 1347, died at Marienwerder, 25 June, 1394.
At the age of seventeen she married the sword-cutler Albrecht of Danzig, a hot-tempered man, whose nature underwent a change through her humility and gentleness. Both made frequent pilgrimages to Cologne, Aachen, and Einsiedeln, and they intended (1390) to visit Rome also; but Albrecht was prevented by illness and remained at home where he died, while Dorothea journeyed to Rome alone. Of their nine children all died, except one daughter who joined the Benedictines. In the summer of 1391 Dorothea moved to Marienwerder, and on 2 May, 1393, with the permission of the chapter and of the Teutonic Order, established a hermitage near the cathedral.
She led a very austere life. Numerous visitors sought her advice and consolation, and she had wonderful visions and revelations. Her confessor, the deacon John of Marienwerder, a learned theologian, wrote down her communications and composed a Latin biography in seven books, “Septililium”, besides a German life in four books. She was never canonized, but the people honoured her as the guardian of the country of the Teutonic Knights and Patroness of Prussia.” Her feast is celebrated on 25 June, in some places on 30 October. The church at Marienwerder is now in the hands of the Lutherans; her relics cannot be found.
Gabriel Meier. (Catholic Encyclopedia)