When the Burmese enemy sacked Ayutthaya in 1767, it spelled doom for the Ayutthaya Kingdom. Burma fired innumerable palaces and temples. Black smoke that rolled in red clouds over the city for months was still kept in the whispering winds on the top of the Great Pagoda. Genocide with mass robbery and rapine swept across the central plain of Thailand, especially in Ayutthaya city, filling water ways and rivers with rows of bodies and blood. Wat Yai Chaimongkol was seized and turned into a fortress, then it became a long-lost temple for a hundred years. Phra Ubosot (Ordination Hall) is full of mystery. The holy spirit of the large reclining Buddha with a length of 15 metres witnessed everything that happened in those days.