Protesters at the Lincoln Memorial

4048 × 2703

Martin Luther King Jr. speaking at rally

2032 × 2950

Prohibition protest march

1440 × 902

People on the Berlin Wall

1754 × 1200

Suffragette arrest in London

1772 × 1489

People on the Berlin Wall

3000 × 1995

Protester offers flowers to soldiers

1029 × 776

Protest sign for workers solidarity

2592 × 3872

Je Suis Charlie memorial

3500 × 2278

Canada on Strike Protest

1920 × 1200

fist raised in solidarity

1275 × 1750

People holding a large EU flag

2464 × 1648

red fist symbol

1440 × 900

World War II memorial plaque

1680 × 1050

WGA strike protest

2048 × 1536

Civil War reenactment battle

1632 × 1224

Women's Strike for Equality

1844 × 1716

Gandhi leading a march

3496 × 2418

Civil War reenactment scene

1668 × 1176

Swearing Allegiance to the Southern Cross

2112 × 1556