or Second Empire style or Second Empire Baroque Architectural style developed at the École des Beaux-Arts in Paris. It enjoyed international dominance in the late 19th century (see Second Empire) and rapidly became an official style for many of the new public buildings demanded by expanding cities and their national governments. Beaux-Arts buildings are typically massive and have a symmetrical plan with rooms arranged axially, profuse Classicist detail, and pavilions that extend forward at the ends and centre. Among the most admired Beaux-Arts structures is the Paris Opéra