Existing in a variety of forms, the quatrain appears in poems from the poetic traditions of various ancient civilizations including Ancient India, Ancient Greece, Ancient Rome, and China; and, continues into the 21st century, where it is seen in works published in many languages.
I always thought that Mgr. refers to a manager and that's what you find in dictionaries as well. People in Czech use it to stress the fact they are the boss:) Magistr does apply to Master, as in Master's degree, and short versions are M, MAS, or mstr.
Moravia is also the centre of the Czech firearm industry, as the vast majority of Czech firearms manufacturers (e.g. CZUB, Zbrojovka Brno, Czech Small Arms, Czech Weapons, ZVI, Great Gun) are settled in Moravia. Almost all well-known Czech sporting, self-defence, military and hunting firearms come from Moravia.