A cargo ship cruises on the partially dried riverbed of the Rhine river at low water levels along the Cathedral in Cologne, Germany, August 15, 2022. REUTERS/Thilo Schmuelgen 

A combination picture shows the Cologne Cathedral as the facade lighting is switched off at eleven o'clock in the evening to save energy due to Russia's invasion of Ukraine, in Cologne, Germany August 9, 2022. REUTERS/Thilo Schmuelgen 

The facade lighting of the Cologne Cathedral is switched off at eleven o'clock in the evening to save energy due to Russia's invasion of Ukraine, in Cologne, Germany August 9, 2022. REUTERS/Thilo Schmuelgen 

The illumination of the Cologne Cathedral is reduced as the lighting is switched off at eleven o'clock in the evening to save energy due to Russia's invasion of Ukraine, in Cologne, Germany August 9, 2022. REUTERS/Thilo Schmuelgen 

The illumination of the Cologne Cathedral is reduced as the lighting is switched off at eleven o'clock in the evening to save energy due to Russia's invasion of Ukraine, in Cologne, Germany August 9, 2022. REUTERS/Thilo Schmuelgen 

The Cologne Cathedral is illuminated before the lighting is switched off at eleven o'clock in the evening to save energy due to Russia's invasion of Ukraine, in Cologne, Germany August 9, 2022. REUTERS/Thilo Schmuelgen 

The Cologne Cathedral is illuminated before the lighting is switched off at eleven o'clock in the evening to save energy due to Russia's invasion of Ukraine, in Cologne, Germany August 9, 2022. REUTERS/Thilo Schmuelgen 

A man walks on a square in front of Cologne Cathedral during heavy rainfalls in Cologne, Germany, May 19, 2022. REUTERS/Thilo Schmuelgen 

A person walks on a square in front of Cologne Cathedral during heavy rainfalls in Cologne, Germany, May 19, 2022. REUTERS/Thilo Schmuelgen 

A demonstrator stands next to a protest sign in front of Cologne Cathedral during the "Friedensdemonstration" (peace demonstration), which replaced the Cologne Rose Monday parade, after Russia invaded Ukraine, in Cologne, Germany, February 28, 2022. REUTERS/Thilo Schmuelgen 

Carnival revellers walk along the Cologne cathedral as they celebrate during "Weiberfastnacht" (Women's Carnival), marking the beginning of the street carnival season, amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 24, 2022. REUTERS/Thilo Schmuelgen 

Carnival reveller and a woman wearing protective face mask makes her way along the Cologne cathedral during "Weiberfastnacht" (Women's Carnival), marking the beginning of the street carnival season, amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 24, 2022. REUTERS/Thilo Schmuelgen 

The dean of the Cologne Cathedral, Guido Assmann, receives a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

A nun stands in a queue to receive a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

People queue to receive a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

People queue to receive a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

People queue to receive a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

People queue to receive a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

People receive a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

People queue to receive a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

A man receives a dose of the Pfizer-BioNTech COVID-19 vaccine during a vaccination event in the Cologne Cathedral on Christmas Eve amid the coronavirus disease (COVID-19) pandemic in Cologne, Germany, December 24, 2021. REUTERS/Thilo Schmuelgen 

An employe of a Christmas market next to Cologne Cathedral checks a 2G rule status of visitors, as the spread of the coronavirus disease (COVID-19) continues in Cologne, Germany, December 1, 2021. REUTERS/Thilo Schmuelgen 

A person with a 2G stamp approving to enter a Christmas market next to Cologne Cathedral, holds a mug, as the spread of the coronavirus disease (COVID-19) continues in Cologne, Germany, December 1, 2021. REUTERS/Thilo Schmuelgen 

People visit a Christmas market next to Cologne Cathedral as the spread of the coronavirus disease (COVID-19) continues in Cologne, Germany, December 1, 2021. REUTERS/Thilo Schmuelgen 

People visit a Christmas market next to Cologne Cathedral as the spread of the coronavirus disease (COVID-19) continues in Cologne, Germany, December 1, 2021. REUTERS/Thilo Schmuelgen 

A sign reads “Divine Office” in front of the main entrance to Cologne’s Cathedral during the first penitential service in the context of coming to terms with the cases of abuse in the Herman Catholic Church in Cologne, Germany, November 18, 2021. REUTERS/Wolfgang Rattay 

A sign reads “Divine Office” in front of the main entrance to Cologne’s Cathedral during the first penitential service in the context of coming to terms with the cases of abuse in the Herman Catholic Church in Cologne, Germany, November 18, 2021. REUTERS/Wolfgang Rattay 

A man jumps in his underwear into the waters of the river Rhine in front of the scenic Hohenzollern railways and pedestrian bridge and the UNESCO world heritage the Cologne cathedral in Cologne, Germany, November 12, 2021. REUTERS/Wolfgang Rattay 

A view of the empty square in front of the Cologne Cathedral during a night-time curfew, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, Germany, April 25, 2021. REUTERS/Thilo Schmuelgen 

A person walks at an empty square nearby the Cologne Cathedral during a night-time curfew, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, Germany, April 25, 2021. REUTERS/Thilo Schmuelgen 

A view of the empty square at Cologne Cathedral during a night-time curfew, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, Germany, April 24, 2021. REUTERS/Thilo Schmuelgen 

An empty street leads to the Cologne Cathedral, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, Germany, April 24, 2021. REUTERS/Thilo Schmuelgen 

An empty street leads to the Cologne Cathedral, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, Germany, April 24, 2021. REUTERS/Thilo Schmuelgen 

Stairs are seen empty during a night-time curfew along the Rhine river near the Cologne Cathedral, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, Germany, April 24, 2021. REUTERS/Thilo Schmuelgen 

Stairs are seen empty during a night-time curfew along the Rhine river near the Cologne Cathedral, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, Germany, April 24, 2021. REUTERS/Thilo Schmuelgen 

The Cologne Cathedral is seen in the early evening on the day a report on abuse cases by clergy at the Cologne archdiocese has been presented in Cologne, Germany, March 18, 2021. REUTERS/Thilo Schmuelgen 

A carnival float showing an unnamed bishop from the 2019 "Rosenmontag" (Rose Monday) parade of Duesseldorf is placed in front of the Cologne Cathedral by activists of the Giordano Bruno Foundation to protest against sexual abuse by Catholic priests in Cologne, Germany, March 18, 2021. Float reads "11 years of brutal honest reconnaissance of sexual abuse". REUTERS/Thilo Schmuelgen 

A part of a carnival float showing an unnamed bishop (not pictured) from the 2019 "Rosenmontag" (Rose Monday) parade of Duesseldorf is seen in front of the Cologne Cathedral by activists of the Giordano Bruno Foundation to protest against sexual abuse by Catholic priests in Cologne, Germany, March 18, 2021. Float reads "11 years of brutal honest reconnaissance of sexual abuse". REUTERS/Thilo Schmuelgen 

A street cleaner works in front of the main entrance of the Cologne Cathedral, in Cologne, Germany, March 18, 2021. REUTERS/Thilo Schmuelgen 

A general view of the Cologne Cathedral, in Cologne, Germany, March 18, 2021. REUTERS/Thilo Schmuelgen 

A picture depicting Cologne Cardinal Rainer Woelki is seen during a protest against sexual abuse by Catholic priests in front of Cologne Cathedral, Germany, March 18, 2021. REUTERS/Thilo Schmuelgen 

A demonstrator holds a placard reading "Tradition & Customs Catholic church cares for tradition! Maintain many traditions! So as abuse!" during a protest against sexual abuse by Catholic priests in front of Cologne Cathedral, Germany, March 18, 2021. REUTERS/Thilo Schmuelgen 

A demonstrator holds a placard reading "Tradition & Customs Catholic church cares for tradition! Maintain many traditions! So as abuse!" during a protest against sexual abuse by Catholic priests in front of Cologne Cathedral, Germany, March 18, 2021. REUTERS/Thilo Schmuelgen 

Icicles are seen on a railing on the banks of the river Rhine in front of the cathedral in Cologne, Germany, February 12, 2021. REUTERS/Thilo Schmuelgen 

Icicles are seen on a railing on the banks of the river Rhine in front of the cathedral in Cologne, Germany, February 12, 2021. REUTERS/Thilo Schmuelgen 

Revellers walk on an empty square at Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller walks on an empty square at Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller walks past a police officer near Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller walks on an empty square at Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

People walk on an empty square at Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller walks past Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller walks past members of the public order office outside Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller walks in front of Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller walks past Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller walks past Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

Members of the public order office patrol around Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller poses in front of Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A lonesome reveller poses in front of Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen TPX IMAGES OF THE DAY 

A lonesome reveller walks past Cologne Cathedral after carnival festivities were cancelled due to the coronavirus disease (COVID-19) pandemic in Cologne, Germany, February 11, 2021. REUTERS/Thilo Schmuelgen 

A woman walks through a park covered with snow nearby the Cologne Cathedral amid the spread of the coronavirus disease (COVID-19) in Cologne, Germany, January 24, 2021. REUTERS/Thilo Schmuelgen