Two men climbed unsecured on the facade of the Frankfurt skyscraper "Skyper".
On Saturday morning, they reached the roof one after the other within 40 minutes and were temporarily arrested by a patrol, the police said.
Because climbing the 153-meter-high office tower is illegal, the men are threatened with trespassing.
Previously, "hessenschau.de" had reported from HR.
The police initially gave no information about the climbers.
However, it is not about the Frenchman Alain Robert, known as "Spiderman".
He climbed onto the Skyper in the Bahnhofsviertel in November 2021 and was also temporarily arrested.