A public execution is a form of capital punishment which "members of the general public may voluntarily attend." This definition excludes the presence of only a small number of witnesses called upon to assure executive accountability. The purpose of such displays has historically been to deter individuals from defying laws or authorities. Attendance at such events was historically encouraged and sometimes even mandatory.

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.