Alexandre-Théodore Brongniart was also a close friend of Jean Antoine Houdon, the pre-eminent French sculptor of the day who sculpted busts of his daughter Alexandrine-Emilie and his son Alexandre Jr. that are now in the Louvre Museum in Paris.

In 1781, he was received as a member of the Académie Royale d'Architecture,[2] and in 1782, he was named architect and controller-general of the Ecole Militaire (Military School).

The Emperor was so pleased with his work that in 1807, he chose Brongniart to design the Paris Bourse (the Parisian stock exchange).

Brongniart's son Alexandre went on to become a respected geologist and director of the famous Sèvres porcelain factory.

In turn, his son Adolphe Theodore Brongniart became a famous botanist[4] known as the father of paleobotany and a recipient of the Wollaston Medal in science text.