San Ildefonso's ensign. Size of flag flown on a Spanish ship during the Battle of Trafalgar, 1805. 145 m2

solidní profilovka z konce Druhý světový

The Reichskrone was the crown of the Holy Roman Empire from the 11thcentury until its dissolution in 1806. This picture shows an American trying it on just for fun

Jedinečná fotka jejíž autorem je Birk Möbius (2014), zachycuje blesk procházející přes letadlo na pozadí duhy. Chybí jen létající jednorožci.

Ikonická fotka z prvního dne provozu pražského metra. 9. května 1974, úsek Florenc, tehdy Sokolovská- Kačerov.

https://twitter.com/KarelPatak1/status/1402896210294411271/photo/1

View of the Statue of Liberty from the balcony on its torch. Access has been closed since 1916.

Usti nad Labem

In 1936, 20 years old Orson Welles staged an all black production of Macbeth in Harlem, a groundbreaking endeavour for the time. The play, which became known as "Voodoo Macbeth" was so popular that the crowds on opening night stretched for more than five blocks. Welles called it his life's greatest achievement.
Before the production opened, the Harlem Communists tried to agitate the community against the project, wrongly believing that Welles had cast black actors in order to create a comic or burlesque version of Shakespeare. The theatre was picketed throughout rehearsals. One man attempted to slash Welles's face with a razor, but Canada Lee, a former boxer, stopped him.
According to Welles, the anger was suddenly replaced "for no reason at all" by widespread excitement and pride in the community as the opening night approached.

a vubec celej zizkov

The Empire State Building, 1941


(source https://www.illumeably.com/ic-article/unexplored-historical-pics )

World War 1 trench over a century later

Some fact: many of the WW1 major battlefields, like the Somme or around Verdun, are still today considered as "Red-Zones" where visitors have to follow delimited paths. This is because so many shells and explosives were used, and many of them still remains underground and are very dangerous.

An incident, some 4-5 years ago, a truck driver had an engine problem and stopped on the side of a country road, the weight of the truck triggered a Moutarde-gas shell that was still there and it leaked... Two people were severely wounded by the gas, road was closed, bomb squad and hazmat teams cleared the area for weeks