The beautiful chapel of St Gertrude was unfortunately destroyed in 1842.
Peace was made at Frankfort in May 1142, when Henry the Lion, son of Henry the Proud, was confirmed in the duchy of Saxony, while Bavaria was given to Conrad's step-brother Henry Jasomirgott, margrave of Austria, who married Gertrude, the widow of Henry the Proud.
By his wife, Gertrude, daughter of Berenger, count of Sulzbach, he had two sons, the elder of whom, Henry, died in 1150.
John and Gertrude Hammerken had two sons, John and Thomas, both of whom found their way to Deventer, and thence to Zwolle and to the convent of Mount St Agnes.
Lothair, unable to capture Nuremberg, gained the support of Henry the Proud, the new duke of Bavaria, by giving him his daughter, Gertrude, in marriage, and that of Conrad, count of Zahringen, by granting him the administration of the kingdom of Burgundy, or Arles.
