What are the meaning of the mathematical patterns on the roof of Fransis of Assisi’s ‘Porziuncola Church?’

Title: The little 9^Th Century Church of Porziuncola (Portiuncula) enclosed in the Papal Basilica of Saint Mary of the Angels, Assisi.

Source: Author: Photo by Georges Jansoone. https://commons.wikimedia.org/wiki/File:S.Maria.degli.Angeli17.jpg and
https://en.wikipedia.org/wiki/Portiuncula

1. One Large Square with 8 smaller squares on each side.
2. Four smaller squares.
3. 2 squares with 3 wave frequency lines.
4. 2 squares with 9 time, 8 pointed stars.