Mary of Nassau-Siegen (1491–1547)

Countess Mary of Nassau-Siegen (February 1491 – 1547), Maria Gräfin von Nassau-Siegen, official titles: Gräfin zu Nassau, Vianden und Diez, was a countess from the House of Nassau-Siegen, a cadet branch of the Ottonian Line of the House of Nassau, and through marriage Countess of Holstein-Schauenburg-Pinneberg.

Biography
Mary was born in Vianden in February 1491  as the second daughter and sixth and youngest child of Count John V of Nassau-Siegen and his wife Landgravine Elisabeth of Hesse-Marburg. Mary was born in the County of Vianden, that her uncle Engelbert II of Nassau had pledged to Mary's father. Her family spent most of the time there from 1489 onwards, because to get to know these new areas and to include them in his administration, Mary's father had to stay there for longer periods.

Mary married in February 1506  to Count Jobst I of Holstein-Schauenburg-Pinneberg (1483  – 5 June 1531  ). It was a double wedding, on the same day Mary's elder sister Elisabeth married to Count. The double wedding of Elisabeth and Mary was held at. A banquet was also held in the city hall in Siegen at which both brides and grooms were present. The feast with the city magistrates was paid for by the brides' father and the city council donated 16 oxen and 19 pigs for the feast. On 16 February 1506, the ʻBeilagerʼ of the two sisters was celebrated in Dillenburg with the greatest of festivities. The purchase of gold fabric for 747 guilders and silk fabric for 396 guilders at the trade fair in Mainz for these celebrations and the wedding of their brother William in Koblenz in May 1506, as well as the unusually high total expenditure of 13,505 guilders in the accounts of 1505/1506, show that these weddings must have been splendid events.

Mary's husband was the son of Count John IV of Holstein-Schauenburg-Pinneberg and his wife Lady Cordula of Gemen.

Mary died in Siegen in 1547. She had nine children including Adolf III of Schauenburg, Archbishop of Cologne from 1547 to 1556, Anton of Schauenburg, Elector and Archbishop of Cologne from 1556 to 1558 and Otto IV of Schaumburg (1517-1576), co-ruler from 1531 to 1560, ruling Count of Holstein-Schauenburg from 1560.