<Tr> <Th> Userkaf </Th> <Td> c. 2494--2487 BC </Td> <Td> Saqqara </Td> </Tr> <Tr> <Th> Sahure </Th> <Td> c. 2487--2477 BC </Td> <Td> Abu Sir </Td> </Tr> <Tr> <Th> Neferirkare Kakai </Th> <Td> c. 2477--2467 BC </Td> <Td> Abu Sir </Td> </Tr> <Tr> <Th> Nyuserre Ini </Th> <Td> c. 2416--2392 BC </Td> <Td> Abu Sir </Td> </Tr>

When were the pyramids built and who built them