Cologne Cathedral (Kölner Dom)

Cologne Cathedral, inscribed on the UNESCO World Heritage List in 1996, showcases an extraordinary diversity of building stones due to its prolonged construction history spanning from 1248 to 1880, with a hiatus of approximately 320 years. This unique geological and historical legacy is attributed to the cathedral's significance as a pilgrimage site since the 12th century, when it was built to house the relics of the Three Magi. The study highlights the use of notable stones such as Drachenfels Trachyte and Schlaitdorf Sandstone, which have contributed to its architectural resilience and cultural importance. Additionally, the cathedral's history includes a period of use as a military storage facility during the French occupation (1794–1814), adding another layer to its complex narrative.

von Plehwe-Leisen, E., & Leisen, H. (2021). Cologne Cathedral (Kölner Dom). Natural Stone and World Heritage, 19–26. https://doi.org/10.1201/9780367823061-5