Complex sentence: The Lindenhof hill is a moraine hill and a public square in the historic center of Zürich, Switzerland, site of the Roman and Carolingian era Kaiserpfalz around which the city has historically grown.
Split into simpler sentences: The Lindenhof hill is a moraine hill and a public square in the historic center of Zürich, Switzerland. It is the site of the Roman and Carolingian era Kaiserpfalz around which the city has historically grown.