Complex sentence: Huni is sometimes credited with building a great stepped pyramid at Meidum (larger than that of Djoser), which was supposedly left unfinished at the time of his death, thus his successor Sneferu, it is said, completed it near the beginning of his reign.
Split into simpler sentences: Huni is sometimes credited with building a great stepped pyramid at Meidum which was to be larger than that of Djoser. It was supposedly left unfinished at the time of his death, thus his successor Sneferu, it is said, completed it near the beginning of his reign.