In return, he received the district of Ahrensbök, the Prussian parts of the former Principality of Lübeck other than the village of Travenhorst, and was given a million taler as compensation from Prussia.

Thus the Grand Duchy of Oldenburg gained access to the Baltic Sea.

[2] She was the fourth daughter of Joseph, Duke of Saxe-Altenburg and Amelia of Württemberg, and was a sister of Queen Marie of Hanover and Grand Duchess Alexandra Iosifovna of Russia.

After he suffered from heart trouble resulting from overwork, Peter's physicians recommended he have a long trip abroad.

[1] He was succeeded as Grand Duke by his eldest son, Frederick Augustus.