Complex sentence: During the 1960s and early and mid 1970s, this was a major Top 40 station in the Tidewater market, broadcasting from a circular (or round) building with glass floor to ceiling windows facing the street.
Split into simpler sentences: During the 1960s & early and mid 1970s, this was a major Top 40 station in the Tidewater market. Broadcasting from a circular (or round) building with glass floor to ceiling windows facing the street.