The Saint-Sylvestre parish church was built between 1860 and 1863 to replace the old church which was built in 1445 and had become too small to accommodate all of Longeville’s inhabitants. Its construction was completed thanks to Napoleon III’s gift of 5000 francs and Jacques Séraphin Lanquetin’s contribution of 4000 francs, with the latter having been born in Longeville and working as a wine trader in Paris where he is elected a member of parliament in 1852. The 25-meter high bell tower of this imposing structure houses two monumental bells, one named “Marie” weighing 1,500 kg and the other named “Anne” weighing 1,100 kg. Both were made in Morteau by Etablissement Bournez in 1857.