Sibylla of Anhalt was born in
Bernburg on 28 September 1564, as the fourth child of Joachim Ernest, Prince of Anhalt (1536–1586) and his first wife,
Agnes of Barby-Mühlingen (1540–1569), daughter of Wolfgang I, Count of Barby-Mühlingen. She had three older sisters and two younger brothers. Sybilla lost her mother when she was five years old, and her father remarried two years later. By her stepmother,
Eleonore of Württemberg (1552–1618), she had ten half-siblings. In 1577, Sybilla's older sister
Anna Maria was relieved from her post as
Imperial abbess of
Gernrode and
Frose in order to marry
Joachim Frederick of Brieg; under pressure from their father, the chapter elected the 13-year-old Sibylla as her successor. Sibylla was confirmed in her office by the emperor
Rudolph II. During her reign as abbess, the only record of her activities comes from an abbey document in which she invested the widow of Stefan Molitor (the first
Evangelical superintendent of the abbey) with a piece of land. In 1581, Sibylla was relieved from her post in order to marry
Frederick, Count of
Mömpelgard and heir apparent of the
Duchy of Württemberg. The marriage was arranged by her stepmother, Eleonore of Württemberg, and the wedding took place in
Stuttgart on 22 May of that year. Her successor as abbess was her younger half-sister
Agnes Hedwig. Only 17 years old at the time of her wedding, Sibylla was described as an unpretentious beauty with a vivid charm and a disposition to be generous and kind. Her natural warm friendliness was said to have contrasted to the somewhat cold nature of Frederick, although the beginning of their marriage seemed to have been loving. == Marriage ==