Der Kölner Dom (Cologne Cathedral) is a Roman Catholic church in Köln (Cologne), Central-Western Germany. It’s a renowned monument of German Catholicism and Gothic architecture and a World Heritage Site. It is also Germany’s most visited landmark, attracting an average of 20,000 people a day. Construction commenced in 1248 and was halted in 1473, leaving it unfinished. Work restarted in the 19th century and was completed, to the original plan, in 1880. The cathedral is the largest Gothic church in Northern Europe and has the 2nd-tallest spires (after Ulm Minster, also in Germany). Its 2 huge spires give it the largest façade of any church in the world. The choir has the largest height to width ratio, 3.6:1, of any medieval church. Cologne’s medieval builders had planned a grand structure to house the reliquary of the Three Kings and fit its role as a place of worship for the Holy Roman Emperor. The cathedral suffered 14 hits by aerial bombs during WW2. It did not collapse, but stood tall in an otherwise flattened city.