Information on the location
Baltimore State Hospital for the Criminally Insane is where Hannibal Lecter is convicted and incarcerated in after failing to murder FBI profiler Will Graham. He is placed under the care of Dr. Frederick Chilton, a pompous, incompetent psychologist whom Lecter despises.
Appearance in the rap battle
This is where Hannibal Lecter was carted to by Barney Matthews to rap against Jack the Ripper. After his second verse is over, Barney appears again to take Hannibal away.