Berkhamsted Castle was taken prisoner at the Battle of Poitiers. When the Black Prince fell ill following his campaigning in France, he retired to Berkhamsted and died there in 1376. Richard II inherited Berkamsted Castle in 1377; initially the use of it was given to his favourite, Robert de Vere and, after de Vere's fall from power and exile in 1388, to John Holland. Henry IV lived in the castle after he deposed Richard in 1400, and he used the property to detain rival applicants to the throne. During this period Geoffrey Chaucer, later famous for his "Canterbury Tales", oversaw renovation work
Sparrenberg Castle protection for the city of Bielefeld, probably founded around 1200. Because the construction of a protective castle generally predates the foundation of a town, it is assumed that there was an older castle. In 1256, the castle was first mentioned in records. In 1346, Bernard, Count of Ravensberg died without issue and, with his death, the line of Calvelage-Ravensberg was extinguished. The castle was transferred through marriage to Count Gerhard I of Jülich-Berg, who had been married to Bernard's niece Margaret since 1338, and its function as the ruling seat was lost. On 18 November 1377, Emperor Charles IV stayed