Complex sentence: The Tron church (built in the 17th century) with its distinctive steeple and clock is the street's best known landmark, and was substantially redeveloped in the 1980s as the Tron Theatre.
Split into simpler sentences: The Tron church (built in the 17th century), with its distinctive steeple and clock, is the street's best known landmark. It was substantially redeveloped in the 1980s as the Tron Theatre.