Charles IV swiftly divorced his adulterous wife, Blanche of Burgundy (c.1296–1326) (sister of Countess Joan), who had given him no surviving children, and who had been locked up since 1313; in her place, he married Marie of Luxembourg (1304–1324), a daughter of Emperor Henry VII (c.1275–1313). Marie died in 1324, giving birth to a stillborn son. He then remarried to his cousin, Joan of Évreux (1310–1371), who however bore him only daughters; when he died in 1328, his only child was Marie, a daughter by Jeanne, and the unborn child his wife was pregnant with. Philip of Valois (1293–1350), Count of Anjou and Valois, Charles' cousin, was set up as regent; when the Queen produced a daughter, Blanche, Philip by assent of the great magnates became Philip VI, of the House of Valois, cadet branch of the Capetian Dynasty.