1502
The St. Jürgen chapel was inaugurated.
1517
The reformer Johannes Bugenhagen stayed on the duke castle.
1523
At this time the city Rügenwalde had 3000 inhabitants.
1534-1535
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The reformer Johannes Bugenhagen stayed as a guest of duke Barnim XI. on the castle and led, from there, the reformation of Pomerania.
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The catholic monasteries Marienkron and See-Buckow were removed by the reformation, the possession expired in the long run at Rügenwalder county.
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Bugenhagen translated the Bible into the Low German (Protestant) and prepared the Pomeranian church order.
1538
Starting from 1538 Barnim IX. modernises the castle, which became an east wing with two floors, a south wing one floor supplemented and the stair towers of the castle became raised. The gate passage was increased.
1556
The castle yard was created as an agricultural operation. Founder was duke Barnim IX..
Opinion of the castle, seen from the River Wipper
1558
A storm tide devastated wide sections of the city.
1566
Rügenwaldermünde had 34 fire places.
1563-1570
The Seven Years' War (The Nordic) gave the highest prosperity in the history to Rügenwalde.
1570-1580
The upper floors of the church and the gate wing were built.
1571
Starting from 1571 duke Johann Friedrich IX. converted the castle.
1576
For the first time a pharmacy at Rügenwalde was mentioned.
1584
The princely brickyard was shifted from Beelkow to Rügenwalde. It was just before the stone gate, on the Ascheberg.
1589
The first large fire raged on 4 July 1589 at Rügenwalde. Besides many houses also the Marien church was heavily damaged.