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The Saint-Louis des Invalides church: 107 meters. The dome, built by the architect Hardouin-Mansart between 1670 and 1679 was built under the impetus of King Louis XIV to accommodate the wounded soldiers of his army. His particuliarity ? Two churches in one: the construction begins with the construction of the "soldiers' church" for the daily worship of the residents and then begins the construction of the great royal church, called "Church of the Dome". The two "churches" are separated by a central high altar. The Dôme des Invalides now houses the tomb of Napoleon I. © Shutterstock