Diocese of Leal or Bishopric of Estonia was the name of the main Latin diocese in Estonia during the early Catholic missionary phase.
History
It was established in 1211, with episcopal see in Leal. The two known bishops were Fulco and Theoderich.
It was suppressed in 1235, to establish on its territory the Roman Catholic Diocese of Dorpat (Tartu), which was itself suppressed in 1558, without succession.
References
Roman Catholic Diocese of Leal Wikipedia(Text) CC BY-SA