The building material of Sacred Heart Hall is very special. It is a kind of white stone. When rainwater comes, the stone will secrete a kind of white substance, which will clean the whole church and make the appearance of the Church always pure and white. Wearing behind the church is a gathering place for painters and artists. Because of its high terrain, it overlooks most of Paris. Two visits to Montmartre Heights saw performances, each performance was very devoted, and also interacted with the audience.