De Republica Emendanda
Modrzewski's crowning achievement printed in 1551 was: Commentariorum De Republica emendanda libri quinque (Five Books of Commentaries on the Improvement of Commonwealth, or Rozważań o poprawie Rzeczypospolitej ksiąg pięć in Polish) published in the printing house of Łazarz Andrysowic. Originally it was to include all five manuscripts: 1. De Moribus (On Customs); 2. De Legibus (On Laws); 3. De Bello (On War); 4. De Ecclesia (On Church), and 5. De Schola (On School). However, as some of Modrevius' theses were considered unorthodox by the Church and opposed, only the three first books were included in the original publication.
The first complete edition – consisting of all five beforementioned books, and dialogues entitled: De utraque specie Coenae Domini ('On the twofold nature of the Lord's Table') – was published in 1554 in Basel by Johannes Oporinus, after which Modrzewski was forced to leave the capital. The first Polish translation by Cyprian Bazylik was published in Łosk in 1577. The book was widely read and praised across Renaissance Europe. It was translated into German, French, Spanish; and Russian in the 17th century.
Read more about this topic: Andrzej Frycz Modrzewski