A transparent acetate sheet is clamped over the paper plans to prevent the wood glue from bonding with the paper.

: Since the PDF templates are essential, many builders place a transparent acetate sheet over the printed plans to protect the paper from glue while building directly on top of it.

: The kit captures the intricate flying buttresses, the famous rose windows, and the soaring twin towers that define the Parisian skyline.

: Official PDF instructions for the 4,383-piece LEGO version are available on LEGO Service Papercraft Models

The PDF’s top section will show a rectangle for each tower. Work upward in 10-layer stacks. To create the battlements (crenellations), glue matches vertically (like teeth) on the top edge.