In the 1830s there was a growing appreciation of the architectural significance of the building which led to the execution of detailed architectural drawings and the publication of proposals for restoration work. By 1835, both the Outer High Kirk and the Barony Kirk had left the premises, leaving only a single congregation using the choir. In 1843 the graves and earth were removed from the Lower Church and, as part of restorations to the crypt and the chapter house, the original levels of the floors were restored and the windows were opened up.[19] The 1840s also saw the demolition of the two towers which flanked the west front, as they were deemed too asymmetrical.