The first writing in the Sursilvan and Sutsilvan dialects appears in the 17th century. As in the Engadine, these early works usually focused on religious themes, in particular the struggles between Protestants and Counter-Reformers. Daniel Bonifaci produced the first surviving work in this category, the catechism "Curt mussameint dels principals punctgs della Christianevla Religiun", published in 1601 in the Sutsilvan dialect. A second edition, published in 1615, is closer to Sursilvan, however, and writings in Sutsilvan do not appear again until the 20th century. In 1611, "Igl Vêr Sulaz da pievel giuvan" ("The true joys of young people"), a series of religious instructions for Protestant youths, was published by Steffan Gabriel. Four years later, in 1615, a Catholic catechism, "Curt Mussament", was published in response, written by Gion Antoni Calvenzano. The first translation of the New Testament into Sursilvan was published in 1648 by the son of Steffan Gabriel, Luci Gabriel.