Could you tell me about these pictures? The pyramids were built around 3000 to 2500 BC and are one of the most impressive monuments of the ancient world. They were built as tombs for the pharaohs, the rulers of Egypt. The first Pharaohs built simpler tombs, called mastabas. These mastabas were square buildings with a room inside for the coffin and the mummy and some things to take with you to the afterlife. Like this over here in the picture? Yes. Then they began to build mounds of earth on top of their mastabas, to make them grander. Ordinary princes and other aristocrats went on being buried in mastabas. The Step Pyramid is one of the first of these new fancy tombs. But, the pyramids we know all have filled in steps. Yes, a short time after these were built, the Egyptians decided to fill in the steps, and then made them more pointed on top. The ones in Giza are this style, right? I think they are the most well-known, everyone in the world must have seen a picture of them. Yes, the ones in Giza were built following this design. Khufu's Great Pyramid was the tallest building on earth for almost 5,000 years, until the Eiffel Tower was built in 1889.