The child King Yot Fa, son of King Chairacha (reign 1534-1547 CE), was executed in 1547 CE by Khun Warawongsa (reign 1548 CE) in this location so that he could usurp the throne.
"In 891, a year of the ox, first of the decade, on Sunday, the fifth day of the waxing moon of the eighth month, Khun Warawongsa, Lord of the Realm, plotted with Queen Regent Si Sudacan to have King Yòt Fa taken to be executed at Khòk Phraya Monastery, but Prince Si Sin, his younger brother, who was only seven years old, was spared. King Yòt Fa had been on the throne for one year and two months." [2]
In 1611 CE King Si Saowaphak (1610-1611 CE) was killed by Prince Si Sin, the younger brother of King Songtham (reign 1610/11?-1628 CE) and his body was buried at this monastery. Prince Sri Sin, rightful heir to the throne, on his turn, was killed in early 1629 CE at Wat Khok Phraya on the order of King Songtham's son Prince Chettha. Van Vliet wrote at that time:
"There he was placed upon a piece of red cloth, whereupon his chest was dashed in with a piece of sandalwood. They wrapped up the body and the sandalwood club in the cloth, and the whole was thrown into a well where the body was left to decompose." [3]
King Chetthathirat (reign 1628-1629 CE) shortly after was executed at this temple at the same time as his mother, Queen Amarit, on the order of the mandarins in August 1629 CE, eight months after his throne ascendancy in December 1628 CE. In 1633 CE, during the third year of King Prasat Thong's reign, the usurper king succeeded in killing nearly all scions of King Songtham at Wat Khok Phraya. Van Vliet wrote:
"Hereupon the three boys (who together were about eighteen years of age) were apprehended, taken to the same place of execution, and killed in the same manner as their lawful uncle and their four brothers. The woman was cut in two and her remains were thrown into the river."