"Eagle" is the short name of the Heraldic-Genealogical Society "Adler" in Vienna, The Company was incorporated on 10. More 1870 as a society, founded in Vienna and Berlin, according to the Herald, the second oldest in Europe. The founders were mostly aristocrats and members of the emerging middle classes in Austria and Hungary. Genealogy, Heraldry and sphragistics of the Austrian nobility were the focus of the activities of the "Eagle", who was one of the most respected companies very soon, dealing with historical auxiliary sciences.