To commemorate his marriage on 5 November 1609, he had Castle Urach converted, turning its "golden room" into one of the finest surviving examples of renaissance banqueting halls in Germany.[citation needed] John Frederick was a well-meaning, peace-loving ruler but he displayed a number of personal weaknesses and was often ill-equipped to deal with the challenges of the era.Most importantly, he had Frederick’s powerful chancellor Matthäus Enzlin condemned to a fortress for life for embezzlement and extortion, subjecting him later to trial on a count of high treason for which he was executed on the market place in Urach in 1613.In fact the duchy ran into further debt leading to unruly debate within the family and even the ranks of servants and eventually problems with the mint.Despite a neutrality accord, the victors of this battle went on to sack the north western areas of the Duke's region and in the years that followed it suffered repeatedly under harmful raids and settlement.