Martin Luther King Jr. speaking at rally

2032 × 2950

Prohibition protest march

1440 × 902

Suffragette arrest in London

1772 × 1489

People on the Berlin Wall

3000 × 1995

Protester offers flowers to soldiers

1029 × 776

Je Suis Charlie memorial

3500 × 2278

Canada on Strike Protest

1920 × 1200

fist raised in solidarity

1275 × 1750

Military parade in Red Square

1024 × 768

D-Day memorial image

1600 × 1200

Child laborers at a factory

3696 × 2602

Soviet Union emblem on aged paper

1600 × 900

Soviet Union emblem on aged paper

1600 × 1000

Man walks past EU graffiti

2048 × 1536

Rosa Parks exhibit with bus

2988 × 1662

Auschwitz concentration camp entrance

2560 × 1600

Soviet rocket engine

1105 × 1469

Crowd around military tanks

1500 × 1051

Civil War artillery crew

2000 × 1852

American Way poster and breadline

1280 × 800