18th arrondissement of Paris. The 18th arrondissement (XVIIIe arrondissement), located on the Rive Droite (Right Bank), is one of the 20 arrondissements of Paris, France. It is mostly known for hosting the district of Montmartre, which contains a hill dominated by the Sacré Cœur basilica, along with the house of music diva Dalida and well known Moulin Rouge cabaret.