The Basilique du Sacré-Cœur is a famous basilica located at the highest point in Paris, on Montmartre Hill. Completed in 1914, it features a distinctive white dome made of travertine stone, which gives it a bright appearance. The basilica is dedicated to the Sacred Heart of Jesus and is a popular site for both tourists and locals. Inside, the basilica boasts stunning mosaics, including the impressive "Christ in Glory," which is one of the largest mosaics in the world. Visitors can also climb to the top of the dome for panoramic views of Paris, making it a must-see landmark in the city.