The name Agenda is given, particularly in the Lutheran Church, to the official books dealing with the forms and ceremonies of divine service.

Old Lutherans were German Lutherans in the Kingdom of Prussia, especially in the Province of Silesia, who refused to join the Prussian Union of churches in the 1830s and 1840s. Prussia's king, Frederick William III, was determined to unify the Protestant churches, homogenize their liturgy, organization, and architecture. In a series of proclamations over several years the Church of the Prussian Union was formed, bringing together a group that was majority Lutheran and minority Reformed. As a result, the government of Prussia had full control over church affairs, with the king recognized as the leading bishop.