The building of the Step Pyramid was quite an achievement. It is the first massive monument built in stone, about 62 meters in height. It is surrounded by a 10 meter high wall, which encloses an area of about 16 hectares. It shows that the kingdom must have been stable and wealthy to have spent so much time and money to build it. The man who designed it and supervised the building was Imhotep, the oldest named architect known to us. Thousands of years later, Djoser was known to Egyptians as the "opener of stone", recognising his legacy of using stone for buildings.