An obelisk (UK: /ˈɒbəlɪsk/; US: /ˈɑːbəlɪsk/, from Ancient Greek: ὀβελίσκος obeliskos; diminutive of ὀβελός obelos, "spit, nail, pointed pillar") is a tall, four-sided, narrow tapering monument which ends in a pyramid-like shape or pyramidion at the top. These were originally called "tekhenu" by the builders, the Ancient Egyptians. The Greeks who saw them used the Greek 'obeliskos' to describe them, and this word passed into Latin and then English. Ancient obelisks are monolithic, that is, they consist of a single stone. Apart from its shape, this is an obelisk's major identifying characteristic, because it demonstrates that the people who raised them had the technological ingenuity required to shift and raise stones weighing hundreds of tonnes. Though this technological capacity exists tod