The Great Church or St. Bavo Church is a Protestant church located in the center of Harlem in the Market Square. It is different from St. Bavo's Cathedral of the Roman Catholic Diocese, and its construction dates back to 1245 AD and was designed in the Gothic style, and is considered one of the oldest and most important monuments in the city, especially Rich in artwork and frescoes, it also houses an antique organ played by Handel and Mozart (George Frideric Handel&Wolfgang Amadeus Mozart).