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In page Princess Fredericka of Saxe-Gotha-Altenburg:

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After her husband's death in 1746 at the age of 31, Fredericka retired to Dryburg Castle in Langensalza, the usual Wittum of the Dowager Duchesses of the Weissenfels branch. Shortly after, she acquired a bourgeois garden and more lands in the east of the old town, in front of the city walls. Between 1749-1751, a Rococo style palace called Fredericka's Castle (German: Friederikenschlösschen) was built under her orders. The building had mansard roofs with ornate dormers; two cavalry houses flanked the castle. The park has an orangery, and a coach house, which still exists today. The entrance portal carries an alliance coat of arms of Saxe-Gotha-Altenburg and Saxe-Weissenfels. The Dowager Duchess died there aged 59. She was buried in the Schlosskirche, Weissenfels.[citation needed]