Collection of 50 birth-stories of the Buddha also known with the Burmese name of Zimmè Paññāsa. Although some of the stories are based upon those in the Pāli Jātaka.they are not regarded as canonical. This collection is believed to have been compiled, by an unknown author, around the 15th century, possibly in northern Thailand. The name Zimmè Paññāsa in fact means ‘Chieng May Fifty’ in Burmese, and it is thought that these stories may have originated in that city in northern Thailand. Three recensions of these birth-stories, all from south-east Asia, have survived to the present day.