The invention of the allowed churches to become cathedrals. (2 words)

its a art history crossword puzzle so there isn't any answers but i need the term.

flying buttresses

Explanation:

The invention of flying buttresses was a crucial step in the development of medieval cathedral design. because they helped to make the soaring, thin stone arches and vast stained-glass windows possible by carrying the load of the building on the outside.

so, not gonna do the actual thing because that's just laziness for an easy assignment like this.

but someone that has a lot of information and interesting details about is picasso. you can easily write a 500 word essay about him and how overtime his paintings of himself got more and more deformed representing that he was forgetting what he looked like and that was from memory.