<P> The New Mexico State Capitol, located in Santa Fe at 490 Old Santa Fe Trail, is the house of government of the U.S. state of New Mexico . It is the only round state capitol in the United States, and is known informally as "the Roundhouse". </P> <P> The building was designed to resemble the Zia Sun Symbol when viewed from above, with four entrance wings that protrude from the main cylindrical volume . Architecturally, the Capitol is a blend of New Mexico Territorial Revival style and neoclassical influences . Above each entrance is a stone carving of the State Seal of New Mexico . The building has four levels, one of which is below ground . </P>

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