Signs with words such as 'All are welcome' and 'Black Dubs you are loved' have replaced racist graffiti on the Ha'penny Bridge in Dublin.
A premises in the Temple Bar area was also sprayed with racist language on Thursday.
The building was tagged with a misspelled message of 'White Lives Matter.'
Gardaí say investigations into both incidents are ongoing.
This is being investigated as a possible racially motivated incident.
A racial slur sprayed on the bridge has been replaced with flowers and anti-racism messages of support.
This man told Newstalk he was shocked to see it happen: "I can't really comprehend that people actually are racist to this day and age, it's a shame".
Another man said it is good to see others standing up for what is right.
"They're a little minority - not everybody in Ireland is racist.
"That was just a good sign that there's some people who actually do care, and they took care of it very, very quickly.
"I feel good as a black person".
And this woman said: "After something so extreme as that, I think it's nice to see that people do care and that black lives do matter - and we are part of the Irish society, we are Irish".
