<human>:  How many people were involved in the coronation ceremony of King Béla IV of Hungary?
<bot>: The coronation ceremony involved a total of 68 people. The ceremony was held in the Great Hall of the Royal Palace in Buda, Hungary. The ceremony began with the arrival of the king and his entourage. The king was then crowned by the Archbishop of Esztergom. After the coronation, the king was given a sword and a crown. The king then rode in a procession through the city of Buda, accompanied by the nobility and the clergy.