The Cologne cathedral is illuminated in Cologne, Germany, Monday, Jan. 5 ... security guards who spotted the young climbers with headlamps on their surveillance cameras in the middle of the night.

German authorities have detained a 41-year-old German-Turkish man in connection to an alleged threat to attack the Cologne Cathedral over the holidays.

German police in Cologne have detained five Frenchmen and a Belgian woman who had tried to climb the city’s famous cathedral. Skip to main content Open Main Menu Navigation ...

Police detain 6 climbers who wanted to scale Cologne's famous cathedral (AP Photo/Martin Meissner, File) FILE - The Cologne cathedral is illuminated in Cologne, Germany, Monday, Jan. 5, 2015.

It's considered Germany's most famous house of worship. BERLIN — German police in Cologne on Sunday detained five Frenchmen and a Belgian woman who had tried to climb the city's famous cathedral.