Complex sentence: The grounds contain a geometrical garden in the Renaissance manner and a massive late 17th century exedra, dedicated to St. Francis Xavier, who stayed at the former castle on the site in 1537.
Split into simpler sentences: The grounds contain a geometrical garden in the Renaissance manner and a massive, late 17th century, exedra. The exedra is dedicated to St. Francis Xavier who stayed at the former castle on the site in 1537.