It was established in 1799 and was replaced in 1818 with the Diocese of Sejny or Augustów.
The Diocese of Wigry was established on 16 March 1799, via the papal bull Saepe factum est.
The need to form the Diocese came after the third partition of Poland, when the bishops of Vilnius, Lutsk and Samogitia were unable to effectively administer their territories in Prussia.
[1] The formation of the Diocese of Wigry was announced through the papal bull Prospiciendo feliciati fidelium on 11 July 1800.
[3] The Diocese of Wigry ceased to exist on 30 June 1818 as a result of the papal bull Ex imposita nobis, which established the Diocese of Sejny or Augustów on the territory of the Diocese.