The Palais Rohan is the name of the Hôtel de Ville, or City Hall

City hall

In local government, a city hall, town hall or a municipal building or civic centre, is the chief administrative building of a city...

 building, in Bordeaux

Bordeaux

Bordeaux is a port city on the Garonne River in the Gironde department in southwestern France.The Bordeaux-Arcachon-Libourne metropolitan area, has a population of 1,010,000 and constitutes the sixth-largest urban area in France. It is the capital of the Aquitaine region, as well as the prefecture...

, France.
The Palais Rohan took three years to build and was completed in 1774. It houses the town hall of Bordeaux and is one of the most celebrated examples of municipal architecture in the region. The building stands in Place Berland and dominates the centre of the old city.
In former times it was the Archbishop's Palace. Parts of it date back to medieval times though it has been improved at various times over the years. Its present appearance is due to renovations in 1771 by Archbishop Ferdinand Maximilien Mériadec de Rohan

Ferdinand Maximilien Mériadec de Rohan

Ferdinand Maximilien Mériadec de Rohan was an Archbishop of Bordeaux starting in 1769, and Prince-Archbishop of Cambrai from 1781. He was the son of Hercule Meriadec de Rohan, prince de Guéméné and Louise-Gabrielle Julie de Rohan; brother of cardinal de Rohan, and Jules, prince de Guéméné.Mériadec...

(hence the name). Parts of it are now a Museum of Fine Arts.