The Place du Tertre is a square in the 18th arrondissement of Paris, France. Only a few streets away from the Basilica of the Sacré Cœur and the Lapin Agile cabaret, it is near the summit of the city's elevated Montmartre quarter. History. The Place du Tertre was the heart of the prestigious Benedictine Montmartre Abbey, established in 1133 by King Louis VI. Montmartre Abbey thrived through the centuries and until the French Revolution under the patronage of the Kings of France. The Place du Tertre was opened to the public in 1635 as Montmartre village central square.
https://en.wikipedia.org/wiki/Place_du_Tertre