I’ve posted before about graffiti which is a form of vandalism in my opinion. Admittedly occasionally there is something which suggests some artistic skill.
There are also promotional pieces such as these at the Arts House on Šiltadaržio g.
On Literatu g. there is a whole range of art of course.
This open-air gallery has been there for a number of years and each time I visit it has added new pieces.
There’s always something to see on the streets of Vilnius.