According to legend, Buddha Shakyamuni after he attained Enlightenment went to the heavenly country of the heaven of the Thirty three Gods to bestow the wise Teaching of his mother Queen Mahamaya in gratitude for her boundless kindness. Buddha Shakyamuni spent three months in the heaven of the Thirty three Gods, bestowing on mother various teachings. And after the inhabitants of the earth called on Buddha Shakyamuni to descend into their world and return to earth, he accepted their invitation.
After completing the Teaching, the leader of the deities Chakra ordered Vishwakarma, the Architect of the Gods, to build a staircase so that Buddha could descent to earth. The base of the stairs was in the town of Sankissa, where Buddha Shakyamuni returned to earth.
His return to earth was due to human ignorance, anger, passions and suffering of all living beings. This event - the descent from heaven to earth - was among the great deeds of Buddha Shakyamuni.