the Just. One clan member became famous for personally taking pagan commander prisoner. In 1331 the Pobóg clan participated in a victorious battle at Płowce against Teutonic Order. In 1359, at Poloniny (Polonini) against Moldavian army. In 1410 Pobóg clan participated under its own colours in the biggest and most famous battle in Europe at this time, at Grunwald (Tannenberg), where the Polish and Lithuanian armies were victorious against the Teutonic Order. The families' warriors were led by Jakub of Koniecpol, palatinus of Sieradz. In 1413 in Horodło (during the signing of Polish–Lithuanian Commonwealth Union), Pobóg clan represented by Jakub of Koniecpol and Piotr of Popow had adopted Lithuanian boyar Rało. Jan Długosz, main Polish mediaeval historian (about 1460 AD), wrote of the Pobóg clan that they were "ad iracundiam proni" ("prone to anger"). According to the work of Jan Długosz and some other documents, the Pobóg coat of arms had in the beginning of 15th century another image. With the Teutonic Order of Knights pushing from the north and Tartars from the east, the clans fought to position themselves for best survival and trade by forming alliances with families in neighbouring countries. Casimir IV Jagiellon became the Grand Duke of Lithuania in 1447, consolidating the two nations, and the clan built many castles during the next century against Turks, Tartars and Muscovites, who became a peril. The Pobóg clan of families continued to make important contributions to the life of Europe in the middle and later. From the 15th century onwards they held significant positions of prestige and power becoming involved in tribal struggles for supremacy, and branched into Pomorze (Pomerania), Russia, Latvia, Lithuania and also Moravia, Hungary and Moldavia. Notable from this time amongst the Clans of Poland was the ancient Pobóg clan of families. Some famous ancestors of the Pobóg clan: Stefan was archbishop of Gniezno. At Stefan's, instigation the sejm was called in Gniezno at which it was decided to bring Kazimierz from the Cluniac monastery and put him on his father's throne, to which end they would not stint their work and efforts. He then went to Rome and asked Pope Benedict IX to release Kazimierz from his monastic vows and profession; then in Cluny he labored to talk Kazimierz into assuming the throne of Poland. Kazimierz bowed to his pleas and persuasions, and Stefan accompanied him back to Poland and crowned him and his