Cologne Cathedral, officially known as Hohe Domkirche Sankt Petrus, is a magnificent Gothic masterpiece located in Cologne, North Rhine-Westphalia, Germany. As one of the most iconic landmarks in the country, it holds a special place in the hearts of both locals and visitors. A Brief History Ancient Site: When construction began in 1248, the site had already been occupied by several previous structures. The builders envisioned a grand cathedral to house the reliquary of the .