Complex sentence: The Chapel of Saint Helena was built in 1728 by count Peter Szaparay on the hill above the town, is surrounded by lindens of which one is more than 250 years old.
Split into simpler sentences: The Chapel of Saint Helena was built in 1728 by count Peter Szaparay on the hill above the town. It is surrounded by lindens, of which one is more than 250 years old.