Is little brother in French petit frère? And do I have to add “le” in front of it?

No you do not think so, and yes i think u do have to add le.

Explanation:

Sorry if its wrong and ill fix it right away.

answer:

where is the musée d'orsay? to lyon in paris in the suburbs 2. what was it originally? it was a station. it was a theater. it was a museum. 3. in what year is the building inaugurated? in 1939 in 1900 in 1986 4. who was his architect? orsay orson welles victor laloux 5. in what year is the building transformed into a museum? in 1986 in 1900 in 1939 6. in which art is the museum mainly dedicated? to nineteenth-century art to impressionist art to twentieth-century art