Otto Lenel (1849-1935) is best known for his reconstruction of the fundamental text of the Roman legal system, the so-called edictum perpetuum of the Roman praetors. The praetors were the government officials responsible for the administration of justice during the Roman republic and the principate (509 BC - 284 AD). The edictum (or edict) was the text in which the newly elected praetor announced how he would handle his responsibilities. More precisely, the edict announced under what circumstances it would succeed and when it would fail. Lenel reconstructed both the text of the edict and tried to establish the order in which the surviving fragments of legal writings had originally been presented before they were cut out and rearranged in the digest. The reconstruction of the edict is the subject of Das edictum perpetuum . By studying the structure of the scholarly writings of the Roman jurists (Lenel's, Palingenesia juris civilis ) Lenel found out how the edict was structured and what provisions it contained. Lenel's work is extremely important for the history of Roman law. It enables modern scholars to consider the original context of the source texts and lends itself to understanding the technicalities of Rome's legal system. German text.