Ancient Rome contributed to the modern legal system through the development of jurisprudence and codified laws. The Roman law system established principles like innocent until proven guilty and the importance of written legal codes, which influenced contemporary legal practices. The compilation of these laws, particularly in the Corpus Juris Civilis, served as a foundational text for many European legal systems. Additionally, Roman legal concepts, including contract law and property rights, remain integral to today's legal frameworks. Thus, Ancient Rome laid the groundwork for the principles that govern modern law.