By the famous Golden Bull of 1356 Frankfort was declared the seat of the imperial elections, and it still preserves an official contemporaneous copy of the original document as the most precious of the eight imperial bulls in its possession.
C. antiquorum, are characterized by the large frontal horn of the bulls, the white legs, the network type of coloration and the pale tint.
C. tippelskirchi the frontal horn is often developed in the bulls, but the legs are frequently spotted to the fetlocks.
Only the bulls have horns, and these are short and insignificant.
The general colour of the old bulls is bluish grey, but younger bulls and cows are browner.