The Cyriaksburg Fortress is situated on a hill outside the city gates of Erfurt. The construction was started in 1480 but not completed until about 1604. The shape of the foundations is like a rectangle with unequal sides. Two strong round towers from 1528 have been preserved. One of them is now used as a viewing tower and the other one houses an observatory. The moat is also partly visible.
From 1631 to 1649, during the Thirty Years' War, Cyriaksburg was occupied by the Swedes. During that time it is said that the famous physicist Otto von Guericke from Magdeburg assisted in fortifying parts of the castle. The remains visible today date back mainly to 1824 until 1830, when the Prussians converted the castle into a fortress. The underground parts house a well of about 40 metres depth for drinking water and for water to extinguish fires. This well dates back to 1530. The brick vaults above the well date back to 1829.
Parts of the fortress were dismantled between 1874 and 1900. The surrounding areas were gradually planted with shrubs and flowers and opened to the public. The rooms of the Cyriaksburg Castle are now used for the permanent exhibition of the German Museum for Horticulture.
References:The Jan Hus Memorial stands at one end of Old Town Square. The huge monument depicts victorious Hussite warriors and Protestants who were forced into exile 200 years after Hus, and a young mother who symbolises national rebirth. The monument was so large that the sculptor designed and built his own villa and studio where the work could be carried out. It was unveiled in 1915 to commemorate the 500th anniversary of Jan Hus' martyrdom. The memorial was designed by Ladislav Šaloun and paid for solely by public donations.
Born in 1369, Hus became an influential religious thinker, philosopher, and reformer in Prague. He was a key predecessor to the Protestant movement of the sixteenth century. In his works he criticized religious moral decay of the Catholic Church. Accordingly, the Czech patriot Hus believed that mass should be given in the vernacular, or local language, rather than in Latin. He was inspired by the teachings of John Wycliffe.