Ahrensbök Charterhouse was a former Carthusian monastery or charterhouse established in 1397. The estates with which it was endowed reached as far as Scharbeutz on the Bay of Lübeck.
During the Reformation the monastery was secularised, and with its estates fell into the hands of John II, Duke of Schleswig-Holstein-Sonderburg, in 1584, who had the buildings demolished.
The building materials were used between 1593 and 1601 for the construction of the castle in Ahrensbök, Schloss Hoppenbrook, which was the principal residence between 1623 and 1636 of the ruler of the newly formed Duchy of Schleswig-Holstein-Sonderburg-Plön while Duke Joachim Ernst I's new castle in Plön was under construction. Once Schloss Plön was finished, the ducal residence was moved there from Ahrensbök, leaving Schloss Hoppenbrook as a secondary residence.
After the death there in 1740 of Duchess Juliane Luise, widow of Joachim Frederick, Duke of Schleswig-Holstein-Sonderburg-Plön, Schloss Hoppenbrook was demolished. The Rathaus of Ahrensbök now stands on its site, in a park in which ditches from the previous castle complex can still be made out.
The only surviving building from the time of the Carthusians is the Brick Gothic St. Mary's church - Marienkirche - which in fact was begun in the first quarter of the 14th century and thus predates the monastery itself: when the charterhouse was established it was taken over for use as the monastery church. It was extended several times, and in 1400 the polygonal quire was added. The tower, with an inscribed sandstone tablet over the portal, was not added until 1761.
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.