Complex sentence: The'big house' was demolished in 1955 for reasons of economy, however the remaining house is still large and the front'wing' is open to the public with rooms, paintings and scultpure on display.
Split into simpler sentences: The'big house' was demolished in 1955 for economic reasons. However the remaining house is still large, and the front'wing' is open to the public with rooms, paintings and scultpure on display.