A bird's eye view of obelisk is square and this structure has gradually tapering four sides and its ends in a pyramidal top.
Originally, Obelisks originated with the holy stone of sanctuary which served the sun god, Ra, in Heliopolis. It usually made a pair in front of gate or sanctuary, and each side of obelisk was written hymn and results of king in hieroglyph.
Obelisks can have interior spaces.
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