These buildings have been gradually deteriorating in Derry for decades - with some of them getting worse year on year.
And as they continue to decay their remarkable histories and architectural qualities become lost with them.
These sites, all based in Derry's evolving city centre, have been compiled by Heritage at Risk Northern Ireland.
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The HARNI project is a partnership between Ulster Architectural Heritage and the Department for Communities: Historic Environment Division.
Since 1993, The Heritage at Risk NI Register highlights more than 500 buildings and monuments of architectural and historic interest whose futures seems uncertain due to lack of use or disrepair.
We've had a look at some of them below.
Old Presbyterian Church, Great James Street
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A very powerful neo-classical composition, this building was built in 1837 to the designs of Stewart Gordon, and was to be the third Presbyterian Church in the city.
According to DfC: "Its front façade is dominated by a projecting central-pediment portico supported by four ionic columns on a broad flight of steps, which are flanked by scrolled edges.
"Behind is a four-bay, two-storey hall with large, round-headed windows. There is a Venetian window on the rear elevation, behind the pulpit. Set back from the main frontage line of the neighbouring buildings on Great James Street, it is certainly an impressive sight, and would be too valuable an asset to lose.
"The building is currently only used as an ad-hoc venue for temporary music events and the foreground of the building used as a car-park. It is hoped that interest in this building prevails as although in need of repair, still remains an impressive building on Great James Street."
Convent of Mercy building, Pump Street
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Originally the offices of the Londonderry Sentinel and Londonderry Standard, this impressive three-storey, brick-built, late-Georgian block, mid-way down the gently sloping Pump Street, forms one of the most imposing groups within the walled city area
DfC said: "The principal building of the group is seven-bays wide and has an impressive entrance door containing and large, elliptical spider's-web fanlight above a finely-dentilled frieze supporting flanking columns on either side of the Georgian recessed and panelled door.
"A fine iron overthrow and railings, that run the length of the building, further adds to the overall effect. The Derry Journal records that the former hotel and convent was converted into commercial premises for Bedlam, a vintage and antique curiosity shop, which occupied the premises in 2011, however it is no longer in use.
"Now in need of a new use, the ongoing regeneration of the city should hopefully ensure that this group can, without too much bother, once again play a prominent role in the life of the surrounding area."
Austins, The Diamond
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Austin’s is the oldest family-owned department store in the world, having been established in Londonderry in 1830 and so predating Harrod’s Department Store in London by 15 years and Macys’s Department Store in New York by 25 years.
Whilst the interior retains only its impressive staircase, the exterior retains much of its flamboyant detailing and remains one of the more impressive buildings in the city, dominating The Diamond.
Former Stradreagh Hospital, Gransha
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The buildings are in very poor condition and partially fire damaged.
A building of potential and in need of intervention to save the historic fabric of the building.
Derry Cathedral Primary School
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Described by Rowan as a red brick building in a “Flemish Gothic style with a corner circular stair tower”, the former Cathedral Primary school is attached to the old city walls, next to the New Gate.
The western elevation opens towards the graveyard surrounding St Columb’s Cathedral. The school was built in 1891 to the designs of the prolific local architect, John Guy Ferguson, and is an attractive multi-gabled structure, not too dissimilar in appearance to the nearby former First Derry Primary School.
The latter has been successfully reused and now houses the Verbal Arts Centre, but the Cathedral school has seen better days having suffered both from vandalism and a lack of maintenance.
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