in Limburg an der Lahn during the construction of the Limburg Cathedral. In 1239 he transferred, at the request of his vassal Friedrich vom Hain, the income of the Netphen parishes to the Premonstratensian Keppel Abbey near Hilchenbach. His descendants took over the patronage of the monastery. Henry's policies in the Herborner Mark angered the local aristocratic families. Around 1240, Henry built Dillenburg Castle to better subjugate the dissidents. By 1248, the century-long Dernbacher Feud had already begun, involving Hesse as well in the context of the War of the Thuringian Succession, because of a feud started by Henry with Sophia of Thuringia and her son Henry I "the Child" of Hesse over the Herborner Mark, which burdened the Nassau-Hessian relationships beyond his death for centuries. The necrology of Arnstein Abbey documented the death of ‘Henrici comitis de Nassauwe, qui contulit nobis ecclesiam in Diffenbach inferiori ...’ on 26 April. Henry is still mentioned in a charter from 1247 and is listed as deceased in a charter from 25 January 1251. This means that he died on 26 April in either 1247, 1248, 1249 or 1250. He was succeeded by his sons Walram II and Otto I. Marriage and children Henry married before 11 December 1215 to Matilda of Guelders and Zutphen (died 28 October 1247 or later), the youngest daughter of Count Otto I of Guelders and Zutphen and Richardis of Bavaria (herself daughter of Otto I Wittelsbach, Duke of Bavaria). From this marriage were born: Rupert (died 19 September before 1247), was granted allod in Diez and Ober-Lahnstein by the Archbishop of Trier, was a knight of the Teutonic Order. Walram II ( – 24 January 1276), succeeded his father as Count of Nassau, is the ancestor of the Walramian Line of the House of Nassau. Otto I (died between 3 May 1289 and 19 March 1290), succeeded his father as Count of Nassau, is the ancestor of the Ottonian Line of the House of Nassau. Henry (died 28 May after 1247), was a monk in Arnstein Abbey. Elizabeth ( – after 6 January 1295), married Gerhard III, Lord of Eppstein (died 1252). Gerhard (died between 7 April 1312 and 20 September 1314), was a clergyman. John (died Deventer, 13 July 1309), was Bishop-Elect of Utrecht 1267–1290. Catharine (died 27 April 1324), became Abbess of Altenberg Abbey near Wetzlar in 1249. Jutta (died 1313), married around 1260 to