The City Hall Annex was a 210 ft (64 m) high-rise in Jacksonville, Florida, located in the Northbank area of downtown.

[1] It was designed by the architecture firm Reynolds, Smith & Hills.

Until its implosion in 2019, the building served as a prime example of Mid-century modern architecture.

The building closed permanently in 2017, with the city planning to demolish it to make room for a new convention center project that was later scrapped.

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