Discover Notre Dame in small groups and learn about this mysterious cathedral entirely surrounded with secrets. See the birthplace of the City of Light. What stories are hidden in 1000-year-old walls of Our Lady? Learn what happened during the Great Fire. Admire the history engraved in every stone of the Cathedral and hear all about its construction. Learn everything about the famous Latin Quarter, its history and culture. Hear about the biggest urban planning ever undertaken. Walk the historic streets of Paris and follow in the footsteps of the alchemists who left their mark on the city. Discover hidden treasures during this unforgettable visit, where magic and science intertwine to create a truly unique experience. Go back in time when Paris witnessed mysterious research in secret laboratories unraveling the laws of nature. The entrance to Notre-Dame Cathedral in Paris is free and open to all. The services offered are independent of access to the interior of the building.