Prince Charles has given his backing to Restoration, the BBC series allowing the public to vote for a listed building to be renovated.
Prince Charles will urge the public to restore more buildings
The prince will reveal during the broadcast of the final on BBC Two on Sunday he has been watching the show.
Ten buildings have been selected for the series, which aims to save a heritage property for the nation.
But he will also remind the public of the 29 other buildings featured on the programme.
He will also urge them to protect other, unpromoted buildings that are also in need of repair.
The final of Restoration this Sunday will be staged at the Tower of London, and presented by comedian Griff Rhys Jones.
The winning building will get £3m from the Heritage Lottery Fund.
During its six-week run, Restoration has averaged three million viewers per episode and several thousand votes each Tuesday and Friday evening.
The show has drawn on the memories and knowledge of local residents, owners and conservation groups.
The votes cast in previous shows have not been carried forward so each building has started with zero votes in the run up to the final.
The final will also see Rhys Jones and historic buildings experts Marianne Suhr and Ptolemy Dean revisit each of the 10 buildings.
They will remind viewers of their individual history and their unique architectural value.
Rhys Jones announced on Thursday that Wilton's Music Hall in Wapping, east London had become the 10th finalist.
He said: "Restoration has been a huge success. It's put conservation concerns on the agenda and I hope entertained a lot of people on the way.
"Lines for the 10 finalists are now open and viewers can start voting on which building they would most like to see restored."
The final will be broadcast live on BBC Two at 2100 BST on Sunday. Voting lines close at 2210, with the winner being announced shortly afterwards.