According to Official Guinness Records,
The Step Pyramid at Saqqara (Saqqâra), Egypt, was the world’s first cut-stone pyramid, constructed in 2750 BC to entomb the mummified body of the pharaoh Djoser. Once clad in polished white limestone, it was the largest building in the world in its time, rising to 62 m (204 ft) high with a base of over 1,200 m2 (12,917 ft2). The pyramid was part of a complex covering 16 hectares (40 acres) – the size of a large town in the third millennium BC – that included temples and courtyards and was surrounded by a wall 10 m (30 ft) high.
For a complete list of 2750 records, please visit 2750 Guinness Records in Singapore.