William I of Württemberg
On 24 January 1816, in Saint Petersburg, he married his first cousin, Grand Duchess Catherine Pavlovna of Russia (1788–1819), daughter of Emperor Paul I of Russia (1754–1801) and Princess Sophie Dorothea of Württemberg (1759–1828). The couple had two children:
Maria of Saxony, Duchess of Pomerania
She married on 27 February 1536 in Torgau Duke Philip I of Pomerania (1515–1560). The marriage of the couple is depicted on the so-called Croÿ Carpet, which shows, in addition to the bridal couple and their families, the Reformers Johannes Bugenhagen, Martin Luther and Philipp Melanchthon. The carpet comes from Cranach's workshop and is now in the Pomerania State Museum in Greifswald. During the ceremony, Martin Luther is reported to have dropped one of the rings, whereupen and he said: "Hey, devils this is none of your business!".