Complex sentence: After the Catholic line of Baden-Baden died out in 1771, Ettlingen became Lutheran under the Margravite of Baden-Durlach the Margrave of Baden became an Elector in 1806 and a Grand Duke in 1806.
Split into simpler sentences: After the Catholic line of Baden-Baden died out in 1771, Ettlingen became Lutheran under the Margravite of Baden-Durlach. The Margrave of Baden became an Elector in 1806 and a Grand Duke in 1806.