Soccer Football - Bundesliga - FC Cologne v 1. FSV Mainz 05 - RheinEnergieStadion, Cologne, Germany - May 17, 2020 A miniature of Cologne Cathedral is seen in the stands before the match, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) Lars Baron/Pool via REUTERS DFL regulations prohibit any use of photographs as image sequences and/or quasi-video

A banner hangs on a bridge in front of the Cologne Cathedral with the inscription "because you are doing heroic deeds: thank you all helpers", as the spread of coronavirus disease (COVID-19) continues in Cologne, Germany, March 30, 2020. REUTERS/Wolfgang Rattay

A n elderly man enters the Cologne Cathedral, as the spread of coronavirus disease (COVID-19) continues in Cologne, Germany, March 30, 2020. REUTERS/Wolfgang Rattay

A banner hangs on a bridge in front of the Cologne Cathedral with the inscription "because you are doing heroic deeds thank you all helpers", as the spread of coronavirus disease (COVID-19) continues in Cologne, Germany, March 30, 2020. REUTERS/Wolfgang Rattay

People walk on the square infront of the Cologne Cathedral during the outbreak of the coronavirus disease (COVID-19) in Cologne, Germany, March 17, 2020. REUTERS/Thilo Schmuelgen

A sign at the main entrance of the Cologne Cathedral is pictured as worships and viewings are cancelled and the church is only open for prayers due to coronavirus (COVID-19) concerns in Cologne, Germany, March 15, 2020. REUTERS/Thilo Schmuelgen

The empty main hall of the Cologne Cathedral is seen as worships and viewings are cancelled and the church is only open for prayers due to coronavirus (COVID-19) concerns in Cologne, Germany, March 15, 2020. REUTERS/Thilo Schmuelgen

A woman prays inside the Cologne Cathedral as worships and viewings are cancelled and the church is only open for prayers due to coronavirus (COVID-19) concerns in Cologne, Germany, March 15, 2020. REUTERS/Thilo Schmuelgen

A woman prays inside the Cologne Cathedral as worships and viewings are cancelled and the church is only open for prayers due to coronavirus (COVID-19) concerns in Cologne, Germany, March 15, 2020. REUTERS/Thilo Schmuelgen

A barrier tape is seen inside the Cologne Cathedral as worships and viewings are cancelled and the church is only open for prayers due to coronavirus (COVID-19) concerns in Cologne, Germany, March 15, 2020. REUTERS/Thilo Schmuelgen

A man stands inside the Cologne Cathedral as worships and viewings are cancelled and the church is only open for prayers due to coronavirus (COVID-19) concerns in Cologne, Germany, March 15, 2020. REUTERS/Thilo Schmuelgen

Carnival revellers dressed up as nurses wear outfits warning of a "Colonia virus" during Women's Carnival Day in front of the famous Cologne cathedral, in Germany February 20, 2020. REUTERS/Wolfgang Rattay

Carnival revellers dressed up as nurses wear outfits reading "Colonia virus" during Women's Carnival Day in front of the famous Cologne cathedral, in Germany February 20, 2020. REUTERS/Wolfgang Rattay

Carnival revellers dressed up as nurses wear outfits reading "Colonia virus" during Women's Carnival Day in front of the famous Cologne cathedral, in Germany February 20, 2020. REUTERS/Wolfgang Rattay

A chapel modelled after Germany's Cologne Cathedral overlooks the breakfast area of an official hotel of the Rugby World Cup in Sapporo, Japan September 23, 2019. REUTERS/Edgar Su

A combination of photos shows the UNESCO World Heritage Cologne Cathedral and the Hohenzollern railway bridge along the river Rhine are seen in this combination picture before (bottom) and during Earth Hour in Cologne, Germany March 30, 2019. REUTERS/Wolfgang Rattay

The UNESCO World Heritage Cologne Cathedral and the Hohenzollern railway bridge along the river Rhine are seen during Earth Hour in Cologne, Germany March 30, 2019. REUTERS/Wolfgang Rattay

The UNESCO World Heritage Cologne Cathedral and the Hohenzollern railway bridge along the river Rhine are seen before Earth Hour in Cologne, Germany March 30, 2019. REUTERS/Wolfgang Rattay

Carnival revellers in costumes pose for a picture in front of Cologne Cathedral during the "Rosenmontag" (Rose Monday) parade in Cologne, Germany, March 4, 2019. REUTERS/Thilo Schmuelgen

People sit outside the Cologne Cathedral as they attend the start of the open-air carnival in Cologne, Germany, February 28, 2019. REUTERS/Wolfgang Rattay

People sit outside the Cologne Cathedral as they attend the start of the open-air carnival in Cologne, Germany, February 28, 2019. REUTERS/Wolfgang Rattay

The "super blood wolf moon" is seen during a total lunar eclipse behind the gothic cathedral in Cologne, Germany, January 21, 2019. REUTERS/Thilo Schmuelgen

The "super blood wolf moon" is seen during a total lunar eclipse behind the gothic cathedral in Cologne, Germany, January 21, 2019. REUTERS/Thilo Schmuelgen

The "super blood wolf moon" is seen during a total lunar eclipse behind the gothic cathedral in Cologne, Germany, January 21, 2019. REUTERS/Thilo Schmuelgen

The "super blood wolf moon" is seen during a total lunar eclipse behind the gothic cathedral in Cologne, Germany, January 21, 2019. REUTERS/Thilo Schmuelgen

The "super blood wolf moon" is seen during a total lunar eclipse behind the gothic cathedral in Cologne, Germany, January 21, 2019. REUTERS/Thilo Schmuelgen

The "super blood wolf moon" is seen during a total lunar eclipse behind the gothic cathedral in Cologne, Germany, January 21, 2019. REUTERS/Thilo Schmuelgen

The "super blood wolf moon" is seen during a total lunar eclipse behind the gothic cathedral in Cologne, Germany, January 21, 2019. REUTERS/Thilo Schmuelgen

REFILE - REMOVING ERRONEOUS INFORMATION The Cologne Cathedral, UNESCO World Heritage Site, is seen behind the new Cologne Central Mosque that is due to be officially inaugurated by Turkish President Recep Tayyip Erdogan during his official visit to Germany, in Cologne, Germany, September 26, 2018. REUTERS/Wolfgang Rattay

The Cologne Cathedral, UNESCO World Heritage Site, is seen behind the new Cologne Central Mosque that is due to be officially inaugurated by Turkish President Recep Tayyip Erdogan during his official visit to Germany, in Cologne, Germany, September 26, 2018. REUTERS/Wolfgang Rattay

The Cologne Cathedral, UNESCO World Heritage Site, is seen behind two minaretes of the new Cologne Central Mosque that is due to be officially inaugurated by Turkish President Recep Tayyip Erdogan during his official visit to Germany, in Cologne, Germany, September 26, 2018. REUTERS/Wolfgang Rattay

The Cologne Cathedral, UNESCO World Heritage Site, is seen behind the new Cologne Central Mosque that is due to be officially inaugurated by Turkish President Recep Tayyip Erdogan during his official visit to Germany, in Cologne, Germany, September 26, 2018. REUTERS/Wolfgang Rattay

The Cologne Cathedral, UNESCO World Heritage Site, is seen behind the new Cologne Central Mosque that is due to be officially inaugurated by Turkish President Recep Tayyip Erdogan during his official visit to Germany, in Cologne, Germany, September 26, 2018. REUTERS/Wolfgang Rattay

The Cologne Cathedral, UNESCO World Heritage Site, is seen behind the new Cologne Central Mosque that is due to be officially inaugurated by Turkish President Recep Tayyip Erdogan during his official visit to Germany, in Cologne, Germany, September 26, 2018. REUTERS/Wolfgang Rattay

Cologne Cathedral, UNESCO World Heritage Site, is seen behind two minaretes of the new Cologne Central Mosque that is due to be officially inaugurated by Turkish President Recep Tayyip Erdogan during his official visit to Germany, in Cologne, Germany, September 26, 2018. REUTERS/Wolfgang Rattay

German customs officers walk in front of the Cologne Cathedral during a raid looking for illegal workers at restaurants, construction sites and in the logistics sector in Cologne, Germany September 11, 2018. REUTERS/Wolfgang Rattay

Members of German special police squad climb to the top of the Cologne Cathedral during police exercises in Cologne, Germany, July 11, 2018. REUTERS/Thilo Schmuelgen

Members of German special police squad climb to the top of the Cologne Cathedral during police exercises in Cologne, Germany, July 11, 2018. REUTERS/Thilo Schmuelgen

Members of German special police squad climb to the top of the Cologne Cathedral during police exercises in Cologne, Germany, July 11, 2018. REUTERS/Thilo Schmuelgen

Members of German special police squad climb to the top of the Cologne Cathedral during police exercises in Cologne, Germany, July 11, 2018. REUTERS/Thilo Schmuelgen

Members of German special police squad climb to the top of the Cologne Cathedral during police exercises in Cologne, Germany, July 11, 2018. REUTERS/Thilo Schmuelgen

The UNESCO world heritage Cologne Cathedral and various flags are reflected in the glasses of a reveller during the annual Christopher Street Day gay pride parade in Cologne, Germany July 8, 2018. REUTERS/Wolfgang Rattay

Revellers take part in the annual Christopher Street Day gay pride parade in Cologne, Germany July 8, 2018. The UNESCO world heritage Cologne Cathedral is seen in the background. REUTERS/Wolfgang Rattay

A sign reads "attention stones" in front of the Cologne Cathedral during heavy winds in Cologne, Germany January 18, 2018. REUTERS/Thilo Schmuelgen

A general view of the Christmas market on the square in front of the world famous gothic cathedral in Cologne, Germany, November 28, 2017. REUTERS/Thilo Schmuelgen TPX IMAGES OF THE DAY

Police officers secure the Christmas market on the square in front of the world famous gothic cathedral in Cologne, Germany, November 28, 2017. REUTERS/Thilo Schmuelgen

Police officers secure the Christmas market on the square in front of the world famous gothic cathedral in Cologne, Germany, November 28, 2017. REUTERS/Thilo Schmuelgen

Visitors walk through the Christmas market on the square in front of the world famous gothic cathedral in Cologne, Germany, November 28, 2017. REUTERS/Thilo Schmuelgen

Visitors walk through the Christmas market on the square in front of the world famous gothic cathedral in Cologne, Germany, November 28, 2017. REUTERS/Thilo Schmuelgen

A general view of the Christmas market on the square in front of the world famous gothic cathedral in Cologne, Germany, November 28, 2017. REUTERS/Thilo Schmuelgen

People walk past concrete barriers placed by police in front of the world famous gothic cathedral in Cologne, Germany, August 23, 2017. REUTERS/Wolfgang Rattay

People walk past concrete barriers placed by police in front of the world famous gothic cathedral in Cologne, Germany, August 23, 2017. REUTERS/Wolfgang Rattay

A banner near the Cologne cathedral (L) and opposite the hotel where Germany's anti-immigration party Alternative for Germany (AFD) is holding a two-day party convention hangs a banner that reads "We see something that you don't see - and this is radical right-wing" in Cologne Germany, April 22, 2017. REUTERS/Wolfgang Rattay

Police stand in front of the Cologne cathedral (Koelner Dom) as activists protest against Germany's anti-immigration party Alternative for Germany (AFD) before the AFD's party congress in Cologne, Germany, April 22, 2017. REUTERS/Ralph Orlowski

Anti-fascists gather outside the Cologne Cathedral with a placard reading "Cologne against hate" during a demonstration against a gathering of ultra-right-wing groups to mark one year since hundreds of women were assaulted on New Year's Eve in Cologne, Germany January 7, 2017. REUTERS/Wolfgang Rattay

An ultra-right-wing group gathers with a placard against mosques near the Cologne Cathedral (rear) during a demonstration against a gathering of ultra-right-wing groups to mark one year since hundreds of women were assaulted on New Year's Eve in Cologne, Germany January 7, 2017. REUTERS/Wolfgang Rattay

Fireworks explode near to the High Cathedral of Saint Peter during New Year celebrations for 2017 in Cologne, Germany, January 1, 2017. REUTERS/Wolfgang Rattay

Fireworks explode near to the High Cathedral of Saint Peter during New Year celebrations for 2017 in Cologne, Germany, January 1, 2017. REUTERS/Wolfgang Rattay

Fireworks explode over the High Cathedral of Saint Peter during New Year celebrations for 2017 in Cologne, Germany, January 1, 2017. REUTERS/Wolfgang Rattay

Fireworks explode near to the High Cathedral of Saint Peter during New Year celebrations for 2017 in Cologne, Germany, January 1, 2017. REUTERS/Wolfgang Rattay