Breslau vs urban center

Breslau and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Breslau	Yes	No	No	No
urban center	Yes	No	No	No

Breslau (noun)	urban center (noun)
a city in southwestern Poland on the Oder	a large and densely populated urban area; may include several independent administrative districts