Nearly 130 buildings in the East of England are at risk from decay and neglect, according to English Heritage.
Parts of Greyfriars Tower date back 700 years
The Buildings At Risk Register highlights those Grade 1 and Grade 2 listed buildings in the region that are in danger of being lost.
The organisation says six buildings in the region have been added to the 2003 list, while five have been removed.
Andrew Derrick, assistant regional director for English Heritage in the East said: "Across the region last year, English Heritage offered grants amounting to over £600,000 towards the repair of 14 buildings on the register.
"Work is now progressing well in Berkhamsted in Hertfordshire on what had been thought to be a plain 19th century shop building, but which turned out to be...dating from the late 13th century.
Buildings removed from register:
Cupola House, Bury St Edmunds, Suffolk
Old Keepers Lodge, Mildenhall, Suffolk
Issac Lord Complex, Fore Street, Ipswich, Suffolk
Abbey Precinct Wall, Bury St Edmunds, Suffolk
15, High Street, Great Dunmow in Essex
"We are working on other buildings in the region and are hopeful that more will soon come off the Register."
English Heritage says that buildings often become "at risk" because of lack of resources for their maintenance, or when they were no longer needed for their original purposes.
Greyfriars Tower in King's Lynn, Norfolk, is a Grade 1 listed ancient monument with parts dating back over 700 years.
It is one of Norfolk's 39 buildings at risk.
Trudi Hughes, historic buildings surveyor for English Heritage said: "Greyfrairs Tower is the only upstanding remains of a Franciscan friary in Lynn.
"It also served as a prominent seamark which has been visible from the River Ouse for hundreds of years."
There are six new entries on the "at risk" register
Among the buildings removed from the list is Cupola House in Bury St Edmunds, Suffolk.
Built in 1693 for Thomas Marco, an apothecary who later went on to become High Sheriff of Suffolk, it takes its name from its distinctive rooftop.
It will open later in the year as a cafe and restaurant.
The Buildings At Risk register was first compiled in 1991, and 90% of buildings on that first register have been saved.
The register is intended to keep attention focused on neglected historic buildings and monuments and to help co-ordinate action by English Heritage, local authorities and funding bodies.
The six new entries on the list are:
Cambridgeshire: Downfield Windmill, Fordham Road, Soham
Cambridgeshire: Warren House, Warren Spinney
Hertfordshire: The Great Barn, Croxley Hall Farm, Rickmansworth
Norfolk: Panxworth Church Tower, Woodbastwick
Norfolk: The Derlyngham Tower, Bishopsgate
Suffolk: Freston Tower, Freston