CNN reports the French Senate said on Monday that Notre Dame must be restored to exactly how it was before the recent fire damaged it.
The 850-year-old historical landmark was affected by a massive fire on April 15.
Paris mayor Anne Hidalgo has said she is in favor of identical restoration.
Prime Minister Edouard Philippe has expressed interest in a new, modern update.
Last month, Philippe announced an international architects' competition to rebuild the fallen spire
French President Emmanuel Macron plans to have the structure rebuilt in 5 years.