The Nyoum Pyramids, also known as the Seila Pyramids, are ancient Egyptian pyramids located in the Al Fayyum Governorate in Egypt. These pyramids were built during the reign of Pharaoh Sneferu, who ruled Egypt during the 4th dynasty. The Nyoum Pyramids are considered to be among the most important ancient Egyptian pyramids, and they are noted for the unique compound structure of their construction.

The Nyoum Pyramids consist of two main pyramids, known as the North Pyramid and the South Pyramid. These two pyramids are linked by a series of smaller satellite pyramids, which form a rectangular compound. The North Pyramid was constructed first, followed by the South Pyramid, which was built on a slightly different alignment than the North Pyramid.

The North Pyramid is the larger of the two, standing at 105 meters (344 feet) in height. It is built of limestone and is surrounded by mastabas, smaller structures used for burials of members of the pharaoh's court. The South Pyramid stands at a height of 48 meters (157 feet) and is also constructed of limestone. It too is surrounded by smaller satellite pyramids and mastabas.

The compound structure of the Nyoum Pyramids is unique among ancient Egyptian pyramids. In fact, only one other compound pyramid has been discovered in Egypt, the famous Bent Pyramid at Dahshur. The Nyoum Pyramids are also notable for their construction techniques, with the use of large limestone blocks in the outer casing of the pyramids and smaller blocks in the inner core.

Archaeological excavations at the Nyoum Pyramids have uncovered evidence of the lives and practices of ancient Egyptian culture. Artefacts found at the site include pottery, jewelry, and furniture, as well as fragments of funerary masks and mummies.

Today, the Nyoum Pyramids stand as a testament to the impressive building skills of the ancient Egyptians. Visitors to the site can marvel at the compound structure and intricate details of the pyramids, as well as learn about the ancient culture that constructed them.