An obelisk is a tall, thin, four-sided, tapering monument which ends in a pyramidal top. Ancient obelisks were made of a single piece of stone a monolith. The obelisk form is known from early Assyrian civilization, represented by the Black Obelisk of King Shalmaneser III from the 9th century BC, now in the British Museum . Obelisks were a prominent part of the architecture of the ancient Egyptians, who placed them in pairs at the entrance of temples. Twenty seven ancient Egyptian obelisks are known to have survived, plus one incomplete obelisk found partly hewed from its quarry at Aswan . The obelisk symbolized the sun god Ra and during the brief religious reformation of Akhenaten was said to be a petrified ray of the aten , the sundisk. It was also thought that the god existed within the structure. The Romans were infatuated with obelisks, to the extent that there are now more than twice as many obelisks standing in Rome as remain in Egypt. Frieght Collect.