In the past, houses in Thailand were built upon foundations that protruded from the ground. The main foundation, right in the middle of the house, was known as a Sao Aek. Before planting this foundation (Sao Aek) into the ground, an assortment of auspicious items were buried below it, with the goal of enhancing the fortunes of the people residing within. It is an elaborate ceremony, which must be determined by calculating an auspicious date in accordance with variables surrounding the owner of the house.