Paris' Notre-Dame Cathedral will reopen on Dec. 7, five and a half years after a devastating fire destroyed its roof and spire and caused major damage throughout.

But the architect formerly in charge of Cologne Cathedral in neighboring Germany fears that things are moving too fast.More than just a beautiful house of worship, Notre Dame is a French national treasure.

The iconic Parisian cathedral is nearing its reopening, five years after the 2019 fire. Here's a glimpse of its legendary architecture and grand history