Pyramid of Djoser
Considered to be the first engineer, architect and physician in history known by name, Imhotep designed the Pyramid of Djoser (the Step Pyramid) at Saqqara in Egypt around 2630–2611 BC, and may have been responsible for the first known use of columns in architecture. The Egyptian historian Manetho credited him with inventing stone-dressed building during Djoser's reign, though he was not the first to actually build with stone. Imhotep is also believed to have founded Egyptian medicine, being the author of the world's earliest known medical document, the Edwin Smith Papyrus.