I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "With the Treaty of the Pyrenees (1659), Spain ceded the northern part of Catalonia to France, and soon thereafter the local Catalan varieties came under the influence of French, which in 1700 became the sole official language of the region."? 

Catalonia used to all be in?