sentences:  After his father's death he also succeeded him as Pfalzgraf.He was married to Hedwig Eleonora of Holstein-Gottorp, who bore his son and successor, Charles XI.Charles X Gustav was the second Wittelsbach king of Sweden after the childless king Christopher of Bavaria (1441–1448) and he was the first king of the Swedish "Caroline era", which had its peak during the end of the reign of his son, Charles XI.