Cologne Cathedral (Kölner Dom) is famous as one of the world's most magnificent examples of High Gothic architecture and for being the most visited landmark in Germany. It holds the Shrine of the Three Kings, a massive gilded sarcophagus believed to contain the relics of the Biblical Magi (the Three Wise Men), which made it a major pilgrimage site for centuries. Architecturally, it is the largest twin-spired church in the world, standing at 157 meters tall. It is also a symbol of German endurance; despite being hit by 14 aerial bombs during World War II, the cathedral remained standing amidst the flattened city. In 2026, it is celebrated not just as a religious icon but as a UNESCO World Heritage site that took over 600 years to complete (1248–1880), representing a masterpiece of human creative genius that attracts over 6 million visitors annually to its breathtaking black marble altar and stained-glass masterpieces.