Contradictory to canon law, Valdemar II reserved the right to appoint the bishops of Reval to himself and his successor kings of Denmark.
The decision to simply nominate the see of Reval was unique in the whole Catholic Church at the time and was disputed by bishops and the Pope.
[2] The last titular bishop of the see was Magnus, Duke of Holstein younger brother of Frederick II of Denmark who had bought Bishopric of Ösel-Wiek on the eve of the Livonian War.
Magnus' attempt to gain control of the Toompea Castle in Reval was prevented by Gotthard Kettler, the master of Livonian Order.
[3] In 1561 Eric XIV of Sweden took control over Reval[4] and after the Livonian war it became the capital city of Swedish Estonia.