Hula is a Hawaiian dance form that is thought to have originated from dances performed by Pele's sister Hi'iaka to appease the volcano goddess Pele. Hula was an integral part of Hawaiian culture and a way to welcome visitors until it was banned in the 20th century but later revived, especially through the annual Merrie Monarch Festival. Today there are two major types of hula: hula kahiko which is religious and sacred, and hula 'auana which is less formal and incorporates Western influences.