Shitennō-ji (四天王寺, Temple of the Four Heavenly Kings) is a Buddhist temple in Ōsaka, Japan. It is also known as Arahaka-ji, Nanba-ji, or Mitsu-ji. The temple is sometimes regarded as the first Buddhist and oldest officially-administered temple in Japan, although the temple complex and buildings have been rebuilt over the centuries, with the last reconstruction taking place in 1963. It is the head temple of the Wa Sect of Buddhism. Prince Shōtoku was known for his profound Buddhist faith when Buddhism was not widespread in Japan during the 6th century. In order to popularize Buddhism, Prince Shōtoku lead a massive national project to promote Buddhism and he commissioned the construction of Shitennō-ji. Prince Shōtoku invited three Korean carpenters from Baekje. They brought knowledge and led the construction of Shitennō-ji. The commission of Shitennō-ji was part of a massive national project led by Prince Shōtoku. The temple buildings themselves have been rebuilt a few times over the centuries; most of the present structures are from when the temple was last completely rebuilt in 1963. One of the members involved in the initial construction of the temple in the 6th century later established the firm Kongō Gumi, which specialized in temple and shrine buildings. Kongō Gumi was the world's oldest company until it was acquired by the Takamatsu Construction Group in 2004. Shitennô-ji Model.jpg|Model of the temple complex at the time of its construction, at [[Osaka Prefectural Chikatsu Asuka Museum]]. Shitennō-ji main hall and pagoda.png|Tinted photo of the larger main hall and pagoda around 1880, prior to the downscaled modern reconstruction. Taken by [[Kusakabe Kimbei]]. 1934 Typhoon Muroto damage at Shitenno-ji.jpg|The rubble of the five-tiered pagoda after destruction by the [[1934 Muroto typhoon]]. "Shitennō" refer to the Four Heavenly Kings in Buddhism. The temple Prince Shōtoku built to honor them had four institutions, each to help the Japanese attain a higher level of civilization.