Weinsberg castle was established on a mountain at the trade route running from Heilbronn to Schwäbisch Hall around the year 1000. In 1140 the castle was besieged by Konrad III in the course of the struggles between the Staufers and the Welfs. Finally it had to surrender on December 21, 1140, since the army of Welf VI to release the castle had been defeated by the Staufers in a battle. According to the report of the Chronica regia Coloniensis, the women of the castle were granted free departure and allowed to take what they could carry on their backs. They carried down their men, and so saved their lives, since the king adhered to his word. The women became known as treue Weiber ('loyal women'). The castle (today's ruin) is called Weibertreu due to this occurrence.
On April 16, 1525 (Easter Sunday), during the German Peasants' War, the peasants attacked and destroyed the castle, which was already damaged from an earlier attack in 1504. They then proceeded to execute the nobleman who had been in command of both town and castle and who had treated the peasants very badly several times before.
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.