De subversione castri ducis Masovie, quod dicitur Wisna.

The Fall of Wisna: Complicity and Divine Justice

Duke Bonislaus of Masovia, scorning God and the faithful, harbors Lithuanian raiders in his castle of Wisna, enabling their plunder of Prussia and Poland; despite repeated warnings, he refuses to cease, prompting Brother Meneko, the Teutonic master, to act on the moral truth that unresisted error becomes condoned sin, leading him to storm and utterly destroy the castle.

In the same year, Bonislaus, duke of Masovia, casting aside the fear of God and holding both God and the faithful in contempt, brought no small harm and grievance upon the enemies of the faith — the Lithuanians — frequently lodging them in his castle of Wisna and allowing them to plunder the land of Prussia and Poland. Nor did he wish to stop this, even though he was wholesomely warned many times. Wherefore Brother Meneko, the master, observing that an error which is not resisted is condoned, and that one who ceases to oppose an open crime does not escape the sting of hidden complicity, gathered a host of warriors, stormed the aforementioned castle, and utterly destroyed it.