ALTRANSTADT, a village of Germany, in Prussian Saxony near Merseburg. Altranstadt is famous in history for two treaties concluded here : (I) the peace which Augustus II., king of Po land and elector of Saxony, was forced to ratify (Sept. 24, 1706) with Charles XII. of Sweden, whereby the former renounced the throne of Poland in favour of Stanislaus Leszczynski—a treaty which Augustus declared null and void after Charles XII.'s de feat at Poltava (July 8, 1709) ; (2) the treaty of Aug. 31, 1707, by which the emperor Joseph I. guaranteed to Charles XII. re ligious tolerance and liberty of conscience for the Silesian protes tants.