"The monument is the tallest unreinforced concrete structure in the world (351 feet). No steel was used to reinforce the concrete. As one pour was completed, large chunks of limestone were left projecting up to connect it to the next pour above. It is also the tallest concrete obelisk in the world; all of the taller obelisks are constructed with blocks of stone. It is the third tallest obelisk in the world (behind the San Jacinto Monument and the Washington Monument)"