Blanche of Lancaster, daughter of King Henry IV on 6 July 1402. In his Palatinate hereditary lands, Rupert turned out to be a capable ruler. It was nevertheless only the indolence of Wenceslaus that prevented his overthrow. After attempts to enlarge the king's allodium caused conflicts with his former ally, the Archbishop of Mainz forging an alliance with Count Eberhard III of Württemberg, the Zähringen margrave Bernard I of Baden and several Swabian cities in 1405, Rupert was compelled to make certain concessions. The quarrel was complicated by the Papal Schism, but the king was just beginning to make some headway when he died at his castle of Landskrone near Oppenheim on 18 May 1410 and was buried at the Church of the Holy Spirit in Heidelberg. On his deathbed Rupert had decreed the division of his heritage among his four surviving sons. He was succeeded as elector by the eldest surviving son, Louis III. The second surviving son, John, received the County Palatine of Neumarkt, the third surviving son, Stephen, Count Palatine of Simmern-Zweibrücken, and the youngest son, Otto, the County Palatine of Mosbach. In the following imperial election on September 20, Louis III voted for Sigismund of Luxembourg, who however lost to his cousin Margrave Jobst of Moravia. Family and children He was married in Amberg on 27 June 1374 to Elisabeth, daughter of Burgrave Frederick V of Nuremberg and Elisabeth of Meissen. They had the following children: Rupert Pipan (20 February 1375, Amberg – 25 January 1397, Amberg) Margaret (1376 – 27 August 1434, Nancy), married on 6 February 1393 to Duke Charles II of Lorraine Frederick (c. 1377, Amberg – 7 March 1401, Amberg) Louis III, Elector Palatine (23 January 1378 – 30 December 1436, Heidelberg) Agnes (1379 – 1401, Heidelberg), married in Heidelberg shortly before March 1400 to Duke Adolph I of Cleves Elisabeth (27 October 1381 – 31 December 1408, Innsbruck), married in Innsbruck 24 December 1407 to Duke Frederick IV of Austria Count Palatine John of Neumarkt (1383, Neunburg vorm Wald – 13–14 March 1443) Count Palatine Stephen of Simmern-Zweibrücken (23 June 1385 – 14 February 1459, Simmern) Count Palatine Otto I of Mosbach (24 August 1390, Mosbach – 5 July 1461) Legacy Rupert's strenuous efforts earned him the surname Clemens ("the Gentle"). He also commissioned the Ruprecht building in Heidelberg Castle. See also Kings of Germany family tree. He was related to