Complex sentence: His history paintings are hard to find on public display but his ceiling for the dining-room of the Sir John Soane's Museum, an "Aurora" adapted from Guido Reni (1837), can be seen obliquely.
Split into simpler sentences: His history paintings are hard to find on public display. His ceiling for the dining-room of the Sir John Soane's Museum, an "Aurora" adapted from Guido Reni (1837), can be seen obliquely.