US Has a National Register of These (old) Houses

This page is the CodyCross answer for the clue below from Beach Bliss, Group 2052, Puzzle 1 (Horizon Line).

Question is: US Has a National Register of These (old) Houses

and the answer is: HISTORIC

Word Meaning:

HISTORIC — Very important; noteworthy: having importance or significance in history.

Definitions from Wiktionary.