The 0 Euro Souvenir Banknote *Dom in Kaliningrad* (QEAN 2021-1) is a vibrant, limited-edition collectible released in Russia in 2021. This colorful banknote commemorates the iconic *Kaliningrad Cathedral*, also known as *Königsberg Cathedral*, a historic architectural landmark situated on Kant Island in Kaliningrad. The cathedral, with its Gothic style and rich history, symbolizes the cultural heritage of the region. Although the banknote holds no monetary value, it is highly sought after by collectors for its artistic design and its depiction of this significant Russian monument. The release highlights the fusion of history, architecture, and local pride through a striking collectible.