Although there are many theories on the origin and history of Halloween, it is generally accepted that Halloween dates back to an ancient Celtic festival known as Samhain, or the Celtic New Year. It was believed that the spirits of everyone who had died during the year would return on the eve of Samhain to seek living bodies to possess for the following year. The Celts would dress in ghoulish costumes and hold noisy revels in an attempt to frighten away these spirits. Food and drink was also offered to pacify the dead. There are many tales of unfortunate souls being burned at the stake because they were perceived to have been possessed by one of the returning spirits. Around the turn of the first century AD, Romans abandoned this custom of human sacrifice in favor of the burning of effigies.