Complex sentence: Not visible from the outside, it covers the entire two-storey annexe of the north wing and is the successor of an older chapel, from 1671, which was demolished before the construction of the castle.
Split into simpler sentences: Not visible from the outside, it covers the entire two-storey annexe of the north wing. It is a successor building of an older chapel from 1671, which was demolished before the construction of the castle.