Complex sentence: During 1945 it was badly damaged by fire and was then left as an empty shell before being demolished in the 1960s, all that remains today are the dilapidated remnants of the former stable block.
Split into simpler sentences: During 1945 it was badly damaged by fire and was then left as an empty shell before being demolished in the 1960s. All that remains today are the dilapidated remnants of the former stable block.