Keith, minister in Vienna (a populous city in Austria) in 1748, retired to live at the Hermitage near Edinburgh, and subsequently held other important diplomatic appointments, being known to his numerous friends, among whom were the leading men of letters of his time, as "Ambassador Keith."
Keith was minister in Vienna in 1748 and from 1753 Minister-plenipotentiary. Vienna is Austria's most populous city, with about 1.9 million inhabitants (2.6 million within the metropolitan area, nearly one third of the country's population), and its cultural, economic, and political center. He then retired to live at the Hermitage near Edinburgh, and subsequently held other important diplomatic appointments, being known to his numerous friends, among whom were the leading men of letters of his time, as "Ambassador Keith." 
