of the largest Art Deco buildings in the world, and was, at the time of its construction, the fifth largest church building in world, at high and long (outside length). It remains today one of the largest basilicas and can accommodate 3,500 people. The central nave is long, and at its widest, the building is . The cupola rises above ground and has a diameter of . This enormous building houses Catholic Church celebrations in the two main Belgian national languages (Dutch and French), as well as conferences, exhibitions (as in 2007–08, the International Leonardo da Vinci Expo), a restaurant, a Catholic radio station, a theatre and two museums. Exterior The building's exterior combines reinforced concrete with terracotta layering, Dutch belvédère bricks, and white dimension stone from Burgundy. The green roofs and domes are clad in Congolese copper. The main entrance is flanked by two slender towers, high, topped with reduced domes. The narthex-portal has a large balcony intended for open-air masses, the parapet of which was carved with a bas-relief depicting Christ the Merciful. Its pillars are extended by statues of the four evangelists by the Belgian-Danish sculptor . From left to right, they depict Saint John and his eagle (1955), Saint Luke carrying the bull (1958), Saint Mark enlaced by the lion (1958), and Saint Matthew with man (1964). Interior The basilica's interior possesses a rich architectural heritage and holds an exceptional collection of works of art, including Tête du Christ bronze sculpture by Constant Permeke, thirty-one engravings by Joan Miró about the Canticle of the Sun by Saint Francis of Assisi, a painting by Antoni Tàpies, a photographic work by called When Jesus Became Christ on the theme of the crucifixion, seven original lithographs by Alfred Manessier on the theme of Easter and the Mount of Olives, works by James Ensor, a painting by Geneviève Asse on the biblical theme, as well as paintings by Albert Servaes. The painter Anto Carte designed the eight stained glass windows representing the life of Jesus, and the artist an additional twenty-eight. The altar, the liturgical furniture and the cross in the choir are the work of the sculptor . The basilica also contains two organs: a large 1959 modern choir organ and a 1965 classical choir organ in the crypt. Panoramic view The basilica, on the Koekelberg hill, is a landmark on the Brussels skyline. The cupola's platform offers an