Ryszard Niedzielski is the creator of one of the most recognizable long-term graffiti projects — the Invasion of the Little Aliens, which successfully took over hundreds of walls, fences, chimneys, and back alleys across the Tri-City in the 1990s. The mural created during Monumental Art features portraits of friends and family, who, as the artist says, allow us to “keep our freedom in times of crisis.” Still, the wall in Zaspa could not resist an invasion from space — in one of the blue squares, you can spot the characteristic “invader.”