Occurrence of Attributes in Original Text
The text related to the cultural heritage 'The 20th-Century Architecture of Frank Lloyd Wright' has mentioned 'United States Department of the Interior' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| Each property has been designated by the United States Department of the Interior as an individual National Historic Landmark, which gives it, under federal law, the highest level of protection. | UNESCO |