The restoration lasted twenty five years and included the construction of a flèche ( a type of spire ) as well as the addition of the chimeras on the '' Galerie des Chimères '' .
The restoration lasted twenty five years and included a taller reconstruction of the flèche ( a type of spire ) which was destroyed during the French revolution . 
 As well as the addition of the chimeras on the '' Galerie des Chimères '' .