Not sure if "adjoining" is the best word to go with in this scenario, But I'd go for true.
The medium of Dan Flavin's Untitled Installation from 1996 is in aquatint. Dan Flavin is known for his minimalistic American style sculptural objects as well as installations. He is well known for his use of fluorescent light fixtures.
Answer:ambulatory vault, barrel vault
Explanation:
these are two types of American vaults