From Justice Sandra Day O’Conner:
The simple black judicial robe has been a part of my life for nearly four decades. I first wore one in 1975 when I became a trial judge in Arizona. When I was appointed to the Supreme Court of the United States, in 1981, I brought that same robe with me to Washington and wore it on my first day on the bench. Although I retired in 2006, I still wear a robe in my role as a “circuit-rider,” sitting frequently, as many retired justices do, on various federal Courts of Appeals across the country.
It is surprising to me how little we know about where this plain black judicial uniform comes from.