It's a kind of cloak used by magistrates or judges. It is also a type of grape, which is presumed originally from Sardinia, 3200 years ago (Grenache). Wine that is made with that grape.
GARNACHA:1. FOOD MEXICANA.2. VARIETY OF VINO.3. VESTIDURA.4. IN SOME REGIONS GARNACHA IS A PEJORATIVE TERM.