William Palmer, also known as the Rugeley Poisoner or the Prince of Poisoners, was an English doctor found guilty of murder in one of the most notorious cases of the 19th century. Charles Dickens called Palmer "the greatest villain that ever stood in the Old Bailey".

The Central Criminal Court of England and Wales, commonly referred to as the Old Bailey after the street on which it stands, is a criminal court building in central London, one of several that house the Crown Court of England and Wales. The street outside follows the route of the ancient wall around the City of London, which was part of the fortification's bailey, hence the metonymic name.