There , Adams signed the renewal of the very liberal Prussian - American Treaty of Amity and Commerce after negotiations with Prussian Foreign Minister Count Karl - Wilhelm Finck von Finckenstein .
John Adams in 1797 appointed his son John Quincy Adams as Minister to Prussia .
There , John Quincy Adams signed the renewal of the very liberal Prussia - American Treaty of Amity and Commerce after negotiations with Prussia Foreign Minister Count Karl - Wilhelm Finck von Finckenstein .
John Adams in 1797 appointed his son John Quincy Adams as Minister to Prussia .