There's anger over the removal of a plaque from Apollo House which honours those who've died while homeless.
It was erected anonymously on Sunday but taken down just a day later.
Last December Home Sweet Home activists took over the empty Tara Street office block and opened its doors to rough sleepers.
After a court battle the building, which is earmarked for demolition, was evacuated in January.
On Sunday a plaque appeared with the slogan "Vulture Republic 1916 to 1917, in honour of those who've died in homelessness. We have people without homes and homes without people. Mission not completed"
However it was taken down almost as soon as it appeared. At last night's montly Dublin Council meeting, Labour rep Dermot Lacey hit out at it's removal.
"It was a mean spirited, nasty thing to do by people who are going to profit overwhelmingly from Apollo House. It could have been left up there for the couple of months that are left of that building, and it was an insult to the people who died on our streets. I would ask that representations be made to have the plaque put up for however long the building is there."
Assistant CEO Brendan Kenny says the local authority had no part in removing it because they didn't even know it was there:
"We know nothing about (the plaque), no idea whatsoever. But we'll try and find out what happened there. There is a contractor appointed to demolish it but it will be standing for a couple of months."
Apollo House and its neighbouring Hawkins House have often been labelled Dublin's ugliest buildings.
They're set to be bulldozed and redeveloped into an office quarter with shops, cafes, public plaza.