In the 21st century, draconian law is a term used to refer to an unusually harsh law. West's Encyclopedia of American Law shares that, historically, draconian law is a set of laws created by Draco, the celebrated lawgiver of Athens.
According to Wikipedia, Draco replaced the oral law with Athen's first written law, which was to only be enforced by a court. These laws were enforced in 621 B.C. The laws were so strict that something as small as stealing a cabbage was punishable by death. History-world.org shares that due to the extreme severity of the laws and their punishments, the people in later times declared them to have been written in blood.