Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade of a restaurant near S-Bahn commuter train at Friedrichstrasse station, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 27, 2020. Picture taken April 27, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade at Geschwister-Scholl-Strasse street as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 27, 2020. Picture taken April 27, 2020. REUTERS/Fabrizio Bensch

The ruins of Anhalter Bahnhof railway station destroyed in the Battle of Berlin in World War Two are pictured, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are seen on the foundation of the Victory Column, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade at Am Kupfergraben street as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 27, 2020. Picture taken April 27, 2020. REUTERS/Fabrizio Bensch

Original bits of graffiti with names and dates left by the Red Army soldiers in the last days of World War Two in 1945 are pictured on walls inside the Reichstag building, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade at Am Kupfergraben street as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 27, 2020. Picture taken April 27, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade of a restaurant near S-Bahn commuter train at Friedrichstrasse station, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 27, 2020. Picture taken April 27, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade at Am Kupfergraben street as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 27, 2020. Picture taken April 27, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are seen on the facade of a bunker, now used as exhibition space of Christian Boros' collection of contemporary art, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade at Grosse Hamburger Strasse street as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are seen on the granite bowl at Lustgarten square, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are seen on the facade of Martin-Gropius Bau exhibition hall as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade of a restaurant near S-Bahn commuter train at Friedrichstrasse station, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 27, 2020. Picture taken April 27, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are seen on the facade of Villa Parey, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are seen on the facade of Martin-Gropius Bau exhibition hall, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch

Bullet holes and traces caused by shrapnel from the Battle of Berlin in World War Two are pictured on a facade at Grosse Hamburger Strasse street as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. Picture taken April 23, 2020. REUTERS/Fabrizio Bensch