Dorothea Augusta of Schleswig-Holstein-Gottorp

Dorothea Augusta of Schleswig-Holstein-Gottorp (12 May 1602 – 13 March 1682) was a German noblewoman from the House of (Schleswig-)Holstein-Gottorp, a cadet branch of the House of Oldenburg. She became the first Duchess of Schleswig-Holstein-Sonderburg-Plön as the wife of Duke Joachim Ernest (1595–1671). Life Dorothea Augusta was born on 12 May 1602 as the fourth child and second daughter of John Adolf, Duke of Holstein-Gottorp and his wife, Princess Augusta of Denmark. She had seven siblings, including three sisters, six of whom survived infancy. In 1633, she married Joachim Ernest, Duke of Schleswig-Holstein-Sonderburg-Plön. On the occasion of their marriage, Joachim Ernest built a new residence and seat of government, Plön Castle, in the seat of his duchy, the town of Plön, which was completed in 1636. The couple ruled over only a small territory, as Joachim Ernest and his four brothers had divided the duchy of their father among themselves, resulting in five small ones. Their estate included Plön, Ahrensbök and Reinfeld.