Holy Roman Emperor (1741–1790) from 1765 until his death, and ruler of the Habsburg lands. Exceptional collection of 42 untranslated LSs in German, signed “Joseph,” most one page, 7.25 x 9, dated between 1766 and 1789. Official correspondence primarily written to Ludwig Count Zinzendorf and his brother Charles, also including some letters to Count Khevenhüller and Count Kressel. In overall fine condition. Ludwig von Zinzendorf was president of the Aulic Chamber of Accounts beginning in 1762; his brother Charles became counsellor there in 1770 before being made president of the New Aulic Chamber of Accounts by Joseph II in 1782. Charles is of special interest to scholarship for his lifelong diaries, which comprise 76 volumes.