This fight even caused the schism of the Old Lutherans. A number of Lutheran congregations refrained to join the new umbrella or seceded from it in the 1820s and 1830s, forming the independent Evangelical Lutheran Church in Prussia recognised in 1845, which was why the Evangelical Church in Prussia renamed as "Evangelical State Church in Prussia" (Evangelische Landeskirche in Preußen), indicating its privileged status. So finally the merger, not including all congregations, materialised as a mere administrative Union, including in Pomerania mostly Lutheran congregations, the traditionally prevailing denomination, and some few Reformed and United Protestant congregations.