[Ant Carlos]

I plan to paint a religious scene on a 3,00m x 3,00m canvas (to be hung on a church). How do I get a canvas as large as that? I checked with the fabric dealers, they only have rolls of cotton up to 2,30 meters large. How did painters like Caravaggio do in the past? David even painted a 9 meters large picture for Napoleon.

Thanks in advance,

Ant