Friedrich II (der Eiserne) (English spelling) Friedrich II

…Frederick tried to restore order in his domain, suppressed the power of the nobility through alliances with the cities, and increased his prestige by fending off attacks from neighboring princes. His son, Friedrich II der Eiserne (reigned 1437-70), changed his policy to favor the nobility and oppress the cities, and in particular fought fiercely against the powerful Hanseatic city of Berlin (then a complex of cities with Cologne on the other side of the Spree River), depriving it of its political independence and privileges in 1442. He also sought to expand his domain, such as by buying back parts of Neumark and Lusatia. …

*Some of the terminology that mentions "Friedrich II (der Eiserne)" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…フリードリヒは領内の秩序再建につとめ，都市と結んで貴族の勢力をおさえ，また近隣諸侯の攻撃をもしりぞけて威信を高めた。その子フリードリヒ2世Friedrich II der Eiserne(在位1437‐70)は，貴族を優遇して都市を圧迫する政策に転じ，わけても有力なハンザ都市ベルリン(当時はシュプレー川対岸のケルンとの複合都市)と激しく闘って，1442年，その政治的独立と諸特権を奪った。また，ノイマルクやラウジッツの一部を買い戻すなど，領土の拡大にも意を用いた。…

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