Question

The New York City townhouse of Henry Clay Frick, an industrial ___________, is now a museum of Western art.

Answer 1

The New York City townhouse of Henry Clay Frick, an industrial magnate, is now a museum of Western art.
This is because it was a very wealthy influential person, most common throughout  business.

Answer 2

The city townhouse was a magneta or whowever you spell it And it is now a museum