Answer
The Louvre Pyramid, a glass and metal structure, was designed by I. M. Pei and serves as the main entrance to the Louvre Museum in Paris. Its controversial design, completed in 1989, sparked debates due to its modern aesthetic contrasting with the historic Louvre palace. Despite initial criticism, the pyramid has become an iconic landmark, symbolizing the museum's transformation and providing a striking juxtaposition between old and new architectural styles.