The chapter house was built concurrently with the east parts of the abbey under Henry III, between about 1245 and 1253. It was restored by Sir George Gilbert Scott in 1872. The entrance is approached from the east cloister walk and includes a double doorway with a large tympanum above.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who restored the chapter house in 1827?
unanswerable