Menius left for
Gotha (1528), resumed teaching, and enjoyed the friendship of
Friedrich Myconius.
John, Elector of Saxony, had placed him on the commission for church visitation in
Thuringia, and in 1529 appointed him pastor and superintendent at
Eisenach, where for eighteen years he administered church affairs with tact, and fostered the spread of education. In 1529 he brought out his
Oeconomia christiana (a treatise in German, on the right ordering of a Christian household) with a dedication to Duchess
Sybil of Saxony and a preface by Luther. Menius's
tractate, written in concert with Myconius, controverting
Der Wiedertaufer Lehre und Geheimniss (1530) was also prefaced by Luther. The reversion to the Roman communion of his old friend Crotus led to his mordant
Responsio amici (1532, anon.) to the
Apologia (1531) of Crotus. He took his part in the theological disputations of the time, at
Marburg (1529), the Concordia at Wittenberg (1536), the
Convention at Schmalkalden (1537), and the discussions at
Hagenau and
Worms (1540). His tractate (1542) against the permission of
bigamy in the case of
Philip of Hesse was not allowed to be printed (the manuscript is in the
University of Heidelberg library). ==Later life==