Answer - C - The main purpose of the Casa Mila, designed by Antonio Gaudí, is as an apartment building.
Key Takeaway: Casa Mila, a building designed by Antoni Gaudí and built during the years of 1906-1910. Built for a married couple, Rosario Segimon and Pere Milà, the building is now mainly an apartment building located in the Eixample distract in Barcelona, Spain. Its wrought iron embellishments are a Catalan specialty and its interior spaces are unique in their elastic walls, allowing for indefinite shapes and design.