Complex sentence: The most notable structure is Merchant Tower (circa 1910,17,000 sq ft, 3-stories with tower, formally named Merchants Hotel) which is a standalone listing in National Register of Historical Places National Register of Historical Places.
Split into simpler sentences: The most notable structure is Merchant Tower (circa 1910,17,000 sq ft, 3-stories with tower, formally named Merchants Hotel). It is a standalone listing in the National Register of Historical Places National Register of Historical Places.