Describe the architecture of the Egyptian?

Egypt is, of course, a country that exist in modern times. By convention, I will assume you are inquiring specifically about Ancient Egyptian architecture.

The ancient Egyptians along the Nile valley relied completely on the regular annual floods of the Nile to allow their crops (and thus, their lives) to continue on. Mixed in with this was the enormously complex spiritual system which included living gods known as the Pharaohs.

Ancient Egyptian architecture typically is characterized by enormous massive limestone structures that were never to be occupied are physically utilized by the very people that slaved to build them. Rather, they were meant to be inspiring structures of perfect geometry and massive scale to house the body of the deceased rulers and provide permanent worship for them.

The materials used was limited to the limestone rock found in the plains and cliffs off the Nile Valley. In some cases, such as Queen Hatshepsut's Mortuary Temple, the space was carved directly into the cliff. In other cases, such as the great pyramids of Giza, the Sphinx, and the obelisks, massive limestone chunks were shaped into incredibly precise modular blocks which were then stacked.