During the 8th century, Charles Martel kept king Theuderic IV prisoner in the castle of Otmus. At this time, the town took the name of Castrum Theodorici, later transformed in Château-Thierry (Castle of Thierry, Thierry is the French or early Roman language translation of Theuderic). In 946, the castle of Château-Thierry was the home of Herbert le-Vieux, Count of Omois of the House of Vermandois & Soissons.
In 1060, Hughes Lambert leveled the top of the hill. The castle of which we see the present-day ruins was founded in the 12th century by the Counts of Champagne. Château-Thierry Castle was rebuilt between 1220 and 1230 by Theobald IV, Count of Champagne, and until 1285 fell under the Lords of Coucy. After that date the castle was part of the royal domain, and then ceded in the early 15th century to Louis I, Duke of Orléans. After his death in 1407 the castle returned to the royal domain.
During the 15th and 16th century the castle was adapted to the use of firearms. The town and castle were taken by the English in 1421 and in 1544 by Charles V, the Holy Roman Emperor.
The Duchy of Château-Thierry was later given to the Bouillon Family, who left it without proper maintenance, causing the castle to fall into ruin.
At present you can see the remains of an enclosure which was defended on the north side by a wall with 8 circular towers with arrow slits, dating back to the early 13th century, and on the south side by a wall with rectangular towers with breeches for guns. One of these towers contains a staircase leading into the gardens. There are also remnants of the gate and the Roman keep and foundations of several other buildings to be seen. The size of the enclosure is very large so this must have been a formidable castle.
At present the site of Château-Thierry Castle can be visited freely during daytime.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.