12 This council was held at Brest. There were present, besides all the Ruthenian bishops, many other ecclesiastics and representatives of the king, the Latin bishops of Lvov, Lutsk and Chelm as papal legates. The bishops of Lvov and Przemysl unhappily withdrew the consent they had previously given, but in spite of this on 8th October 1596 the union of the Ruthenian community with the Catholic Church was happily confirmed and proclaimed. It was the general hope that this union and association, which answered so perfectly the needs of the Ruthenian people, would be abundantly fruitful of good.
Source: Orientales Omnes Ecclesias (Vatican.va)