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Since the Nuremberg Trials, penal law is taken to include the prohibitions of international criminal law, in addition to those of domestic law.[2] Thus, prosecutions have been possible of such individuals as Nazi war criminals[3] and officials of the German Democratic Republic responsible for the Berlin Wall,[4] even though their deeds may have been allowed or even ordered by domestic law. Also, courts when dealing with such cases will tend to look to the letter of the law at the time, even in regimes where the law as it was written was generally disregarded in practice by its own authors.[citation needed]