He returned to Leipzig in 1568. In 1570 he accepted a call from
Duke Julius as court-preacher and superintendent in Brunswick, but
returned to Leipzig in 1574. Before the unmasking of the
Crypto-Calvinists his theological attitude lacked clearness and
determination. Ever after, however, he was the leader of the Lutheran
forces in Electoral Saxony. At the Lichtenberg Convention, convoked
February 16, 1576, by Elector August, Selneccer successfully advocated
the removal of the Wittenberg Catechism, the _Consensus Dresdensis_, and
the _Corpus Philippicum_. In their place he recommended the adoption of
a new _corpus doctrinae_ containing the three Ecumenical Creeds, the
_Unaltered Augsburg Confession_, the _Apology_, the _Smalcald Articles_,
the Catechisms of Luther, and, if desired, Luther's _Commentary on
Galatians_. Finally he advised that the electors and princes arrange a
convention of such representative theologians as, _e.g._, Chytraeus,
Chemnitz, Andreae, and Marbach, to discuss the doctrinal differences.
Selneccer's recommendations were adopted by the convention and
transmitted to Elector August. Though contributing little to the
contents of the _Formula of Concord_, Selneccer heartily cooperated in
its preparation, revision, and adoption. In 1580, of his own accord, he
published the Latin _Book of Concord_, which was followed in 1584 by an
edition authorized by the princes. Selneccer also participated in
preparing the _Apology of the Book of Concord_, first published 1582 in
Magdeburg. In May, 1589, after the Crypto-Calvinistic reaction under
Christian I, Selneccer, whom the Calvinists hated more than others of
the theologians who had participated in the promulgation of the _Formula
of Concord_, was deposed, harassed, and reduced to poverty because of
his testimony against Chancellor Crell and his earnest and continued
warnings against the Calvinists. After the death of Christian I,
Selneccer was recalled to Leipzig, where he arrived May 19, 1592, five
days before his death, May 24, 1592.]

Having through the influence of Selneccer, at Lichtenberg, obtained the
consent of his clergy to his plans of unification, and, also in
accordance with their desire, called Andreae to Saxony, Elector August
immediately made arrangements for the contemplated general convention of
theologians. It was held at Torgau, from May 28 to June 7, 1576, and
attended by Selneccer, the Saxon ministers who had participated in the
Lichtenberg