Frederick II (1194–1250), the Holy Roman emperor, ruled that any that were studying to be a physician or a surgeon must attend a human dissection, which would be held no less than every five years. Some European countries began legalizing the dissection of executed criminals for educational purposes in the late 13th and early 14th centuries. Mondino de Luzzi carried out the first recorded public dissection around 1315. At this time, autopsies were carried out by a team consisting of a Lector, who lectured, the Sector, who did the dissection, and the Ostensor who pointed to features of interest.