The extant Brahma Purana is likely different from the original one. R. C. Hazra concluded that it is not the real one, but an upapurana, which it was known as until the 16th century. Many of its verses are actually taken from the other Puranas. Moriz Winternitz concluded only a small part of it belongs to the older one. Since it mentions the existence of the Konark Sun Temple built in 1241, most of the chapter on pilgrimage sites in Orissa couldn't have been written before the 13th century. The surviving manuscripts comprise 245 chapters. It is divided into two parts: the Purvabhaga (former part) and the Uttarabhaga (latter part). The text exists in numerous versions, with significant differences, and the text was revised continually over time. Further, the Brahma Purana likely borrowed numerous passages from other Hindu texts such as the Mahabharata and Puranas such as the Vishnu, Vayu, Samba, and Markandeya.