Petar II Petrović-Njegoš (NYEH-gush)was a Serbian Orthodox Prince-Bishop and a ruler. However, he is most famous for his poetry. Both my kids had to learn by heart extensive passages from his works in grade school (no, they can't recall much....), but Njegos is still considered to be the best poet in the Serbian language.
The mural behind him has been there for a long time; I'm trying to remember the name of the artist...