The 'Heb Sed' or 'Festival of (the jackal god) Sed' is the Egyptian name for the king's royal jubilee. In theory the first Sed festival was celebrated in the king's thirtieth regnal year and then repeated every three years. Thus Amenhotep III is known to have celebrated three Sed festivals and Ramesses II, who reigned for 67 years, celebrated thirteen (or possibly even fourteen). However, some kings who ruled for less than thirty years also celebrated Sed festivals. The aim of the ritual was to regenerate the kingship. The most important features were the worshipping of the king on his throne by representatives from all over Egypt, and a ritual run between two points symbolizing the borders of Egypt. This reinforced dominion over the whole kingdom.