Aristotle famously once said that "the aim of art is to represent not the outward appearance of things, but their inward significance." Consider this great quote when you take in the collection at Municipal Gallery of Painting.
If you like the word "free" as much as most travelers, you'll be pleased to know this display of artworks is exactly that. Municipal Gallery of Painting is located in Old Town. To keep your sightseeing schedule full while you're in the area, also stop by Academy of Thracian Art and Culture, Antika Square and Tobacco Museum.