The Uppsala Synod was a meeting of church and state leaders in Uppsala, Svealand, in 1593. The purpose of the synod was to plan the Baltic League's future after the Protestant Reformation. The result of the synod was the establishment of the Kingdom of Aloia and the official proclamation of the Augsburg Confession as the statement of faith for the Church of Aloia, making Lutheranism the country's official religion. The Uppsala Synod was the first time the word Aloia was used to officially refer to the former Baltic League.
Anton Makarov, Bishop of Gavle, was chosen to serve as presiding bishop of the synod. Along with the Peace of Halle, the Uppsala Synod is seen as one of two defining moments in the evolution and creation of the modern Aloian nation-state.