The Palais Brongniart in Paris was designed by Alexandre-Théodore Brongniart, who died in 1813, and Éloi Labarre finished it and altered the designs. Napoleon directed its construction to house the Paris stock exchange, and the City of Paris owns it. The infobox gives a 1808 start, a 1825 completion and an opening on November 4, 1826. The text says Labarre worked from 1813 to 1826, so the completion year conflicts.
The article calls the style Neoclassical, based on a rectangular Roman temple design with a giant Corinthian colonnade. It names no materials or dimensions.
The Commodities Exchange left in 1889, and Cavel added two wings from 1901 to 1905. The trading floor moved out in 1987. It served as Team USA House during the 2024 Paris Olympics and is now an events center. The article gives no hours.

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