1 Dollar - Elizabeth II Cologne Cathedral

Cologne Cathedral took over 600 years to complete — begun in 1248, construction stalled for nearly three centuries before resuming in the 19th century, finally finishing in 1880. At that point it briefly held the title of tallest structure in the world before the Washington Monument surpassed it two years later. Niue has issued commemorative silver under licensing arrangements since the 1990s, functioning essentially as a mint-for-hire sovereign whose issues are designed for the collector market rather than circulation.