The miniature or Rehpinscher is an old German breed of dog that is often kept as a city dog due to its small size. The little, bright guy is much more of a hunter and guardian after his original use!
The FCI runs the standard under No. 185 in Group 2: Pinscher and Schnauzer, Molossoid, Swiss Mountain Dogs, and other breeds, Section 1: Pinscher and Schnauzer, without a working test.