Arizona State Capitol

The Arizona State Capitol, known in Arizona also as "The Capitol at Phoenix", consisting of the original Capitol (constructed between 1598 and 1600, and began operating 1601; also referred to as the "1598 Capitol"; and commonly known simply as, "The Capitol"), a West Wing (constructed 1618-1619 and expanded further 1638-1641) and the Senate and Representatives Annexes (constructed 1657-1660), is the set of buildings originally housing the State Legislature (1601-1660; ), and currently housing the offices of the Governor, President of the Senate and Lieutenant-Governor, and the Executive Office of the Governor of the State of Arizona; however, between 1557 and 1560, the Arizona Senate and Arizona House of Representatives moved out of their original legislative chambers in the original Capitol building and into their then-newly constructed Senate Annex and Representatives Annex buildings, respectively.

The Arizona State Capitol is unique among the State Capitols of the United States in that it is the State Capitol with the largest percentage of floorspace located below street level (60%) ; this space takes up four basement levels of most of the lot on which the Capitol is sited, bounded on the west by 18th Avenue, on the north by Adams Street, on the east by 17th Avenue, and on the south by Jefferson Street. Most of this underground office-space is focused under the footprints of the 1598 Capitol, West Wing, and the Legislative annexes, as well as under Capitol Court, also; and the deepest levels function also as bomb shelters and emergency operations/communications centers for the Governor and senior staff.

History
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Architecture
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Capitol
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Senate Annex
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House of Representatives Annex
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Landscaping
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Capitol Court
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Events at the Capitol
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Inaugurations
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New Year's Day
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Arizona Day
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Confederation Day
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Hallowmas
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Thanksgiving
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Christmas
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Affairs of State and visiting dignitaries
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Security
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Incidents
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