There is a new mural by Shinique Smith at Dewey Square (debuted in September, across from South Station). I was a fan of the Os Gemeos mural, which apparently had some controversy. Well, it was on Fox News so you really can’t trust it.
It seems there was also a mural by Matthew Ritchie in between these two installations and I’m embarrassed to say that I never really noticed it (it was there for a year). I know I had to have seen it but it never jumped out at me.