Please help: Can't catch the meaning of "rescued from the roof of a condemned treasure in the city"
The sentence is simple and is not connected with previous and further parts of the text. It's from 'The Night Manager' by Le Care. The scene happens in the hotel.
"Feeling a need to move, he launched himself on a tour of the construction work in the north wing where Herr Meister was building a grill-room out of the wood of old Arolla pine rescued from the roof of a condemned treasure in the city."
My first guess was that the pine was very big and they had cut off the top of it because it was broken or something like that. So, the 'condemned treasure' is the part of the pine wich had suffered from something. Am I right?