Question: who created a system of 400 laws for the byzantine empire

title: Byzantine law
text: In accordance with the late Roman legal tradition , the main source of law ( fons legum ) in Byzantium remained the enactments of the emperors . The latter initiated some major codifications of the Roman law , but they also issued their own `` new laws '' , the Novels ( `` Novellae '' , `` Νεαραὶ '' ) . In early Byzantine ( late Roman ) era the legislative interest of the emperors intensified , and laws were now regulating the main aspects of public , private , economic and social life . For example , Constantine I was the first to regulate divorce and Theodosius I intervened in faith issues , imposing a specific version of the Creed . From Diocletian to Theodosius I , namely during approximately 100 years , more than 2,000 laws were issued . Justinian alone promulgated approximately 600 laws . Gradually , the legislative enthusiasm receded , but still some of the laws of later emperors , such as Leo III 's Novels , are of particular importance . Custom continued to play a limited role as a secondary source of law , but written legislation had a precedence . 

Answer: answer: In early Byzantine era the legislative interest of the emperors intensified, and laws were now regulating the main aspects of public, private, economic and social life. From Diocletian to Theodosius I, namely during approximately 100 years, more than 2,000 laws were issued. Justinian alone promulgated approximately 600 laws.