Margrave Ernest I of Baden-Durlach (7 October 1482, Pforzheim – 6 February 1553, Sulzburg) was the founder of the so-called "Ernestine" line of the House of Baden, the line from which the later Grand Dukes descended. He was the ruling Margrave of Baden-Pforzheim from 1533 and resided in Pforzheim from 1537. In 1565, his son Charles II moved the capital to Durlach and thereby changed the name of his country to Baden-Durlach. He had to deal with the upcoming Reformation and the frequent Ottoman wars in Europe. In this turbulent time, he tried to maintain a neutral position between the Protestants and Catholics. He did not participate in the Schmalkaldic War.