the great pyramid was the tallest man made structure for over 3800 years. It was built over a 20 year period concluded in 2560 bc. Khufus vizier Hemiunu is believed to be the Architect for the pyramid. Originally the pyramid was covered with casing stones that made the outside smooth. the great pyramid of giza is the main part of the complex setting of buildings that included 2 mortuary temples in honor of Khufu himself. Next to the kings pyramid are three smaller pyramids for Khufus wives.