<Tr> <Th> Constructed </Th> <Td> c. 2580--2560 BC (4th dynasty) </Td> </Tr> <Tr> <Th> Type </Th> <Td> True pyramid </Td> </Tr> <Tr> <Th> Material </Th> <Td> Limestone, granite </Td> </Tr> <Tr> <Th> Height </Th> <Td> 146.7 metres (481 ft) or 280 Egyptian Royal cubits 138.8 metres (455 ft) (contemporary) </Td> </Tr>

Purpose of the grand gallery in the great pyramid