Djoser was an ancient Egyptian pharaoh of the Third Dynasty, known for his significant contributions to the development of pyramid construction. He reigned during the 27th century BCE and is best recognized for commissioning the Step Pyramid at Saqqara, which is considered the earliest colossal stone building in Egypt. This innovative structure marked a major advancement in architectural techniques. The Step Pyramid was designed by the architect Imhotep, who is often regarded as one of the first known architects in history. Djoser's reign is also notable for advancements in art, culture, and administration, laying the groundwork for future pharaohs and the evolution of the Old Kingdom period in ancient Egypt.