Walking through the courtyard from Piotrkowska 3 (or from ul. Zachodnia 56) really highlights how such a simple idea can have a big impact. Róża's Passage (Pasaż Róży) brings light and intrigue to this, a courtyard link between two main streets that once contained a dark, rundown former hotel later turned into residential flats, by creating funky mosaics that reflect natural light via thousands of mirror shards. The effect is stunning and truly transforms the surrounding buildings. The creator is Joanna Rajkowska (also responsible for the palm tree in Warsaw!), who chose the name after her daughter, Róża, who at a young age was diagnosed with retinoblastoma, a rare form of eye cancer. Following chemotherapy, she was again able to see. Róża's Passage underwent the same journey, as, in the author's own words, [it went] "from not seeing to seeing". If you find yourself at the very beginning of Piotrkowska and near Plac Wolności, you simply cannot miss this courtyard of urban art.