In the spring of 1937, a prisoner arrived at Sachsenhausen concentration camp near Berlin. On his uniform was a pink triangle, pointing downward. He was not Jewish. He was not a political prisoner. He had been arrested under Paragraph 175 — a German law that criminalized sexual acts between men. Thousands of men wore that same triangle. Most did not survive the war.

Paragraph 175 and the Nazi State

Paragraph 175 was not a Nazi invention. The law dated back to 1871, when the German Empire was founded. It made "unnatural fornication" between men a criminal offense. Enforcement varied over the decades. During the Weimar Republic, from 1919 to 1933, the law was rarely applied strictly. Berlin became a relatively open city. Gay bars, cabarets, and organizations flourished. Magnus Hirschfeld's Institut für Sexualwissenschaft, founded in 1919, conducted research and offered counseling. The institute also campaigned for the repeal of Paragraph 175.

Then came 1933. The Nazis took power on January 30. Within months, the institute was raided. On May 6, 1933, students and SA troops broke in. They threw tens of thousands of books into the street. Days later, those books burned in the Opernplatz. It was one of the most visible book burnings of the Nazi era.

In 1935, the Nazis revised Paragraph 175. The new version was much broader. A wider range of acts now qualified as criminal. Arrests rose sharply. Between 1933 and 1945, an estimated 50,000 men were convicted under the law, according to historian Rüdiger Lautmann's research published in 1977. Between 5,000 and 15,000 ended up in concentration camps. The estimates vary. Many records were destroyed or never kept.

The Triangle System Inside the Camps

The Nazi concentration camp system used colored triangles to classify prisoners. The triangles were sewn onto uniforms, always pointing downward. Political prisoners wore red. Jehovah's Witnesses wore purple. Jews wore two overlapping triangles forming the Star of David — one yellow, one the color of their other category. Men convicted under Paragraph 175 wore a pink triangle.

The badge was more than administrative. It marked men for particular treatment. Former prisoners and historians have documented that men with pink triangles were often assigned the most brutal labor. They were placed in the worst barracks. Violence from guards was frequent. Fellow prisoners sometimes shunned them.

Eugen Kogon, a political prisoner at Buchenwald, described this hierarchy in his 1946 book Der SS-Staat. He noted that men with pink triangles occupied the lowest position in the camp's social order. Kogon was not writing as an advocate. He was writing as a witness.

Not all men in the camps wore pink triangles for the same reason. Some were convicted under Paragraph 175. Others were arrested during police raids without formal conviction. Some historians, including Geoffrey Giles, have noted that the category was applied inconsistently. The documentation that survives is incomplete.

Women who had relationships with other women were generally not targeted under Paragraph 175 — the law applied only to men. Lesbian women were sometimes imprisoned under other categories, such as "asocial," marked with a black triangle. Their experience was different, and largely separate from the history of the pink triangle.

Silence After Liberation

When the camps were liberated in 1945, survivors faced an uncomfortable reality. Men convicted under Paragraph 175 were not recognized as victims in the same way as other groups. In West Germany, Paragraph 175 itself remained in force after the war. The revised Nazi version stayed on the books until 1969. Men who had survived the camps could, in theory, be arrested again for the same offense.

There was no official commemoration. No reparations. Many survivors kept silent for decades. The pink triangle disappeared from public memory almost entirely. The broader history of Nazi persecution focused on Jewish victims, political prisoners, and others. The men who had worn pink triangles were largely absent from that narrative.

This silence lasted for roughly thirty years. It began to crack in the 1970s.

Reclaiming the Symbol

In 1972, German gay rights activists began referencing the pink triangle in political writing. The historian Rüdiger Lautmann published statistical research on gay men in the camps in 1977, providing one of the first serious academic treatments of the subject. His work gave the history a foundation in documented evidence.

Then came the AIDS crisis. In the early 1980s, a new epidemic was killing gay men in large numbers. In New York, San Francisco, and cities across the world, communities organized responses as governments moved slowly. Activists needed a visual language. They needed symbols that carried weight.

In 1987, the group ACT UP — the AIDS Coalition to Unleash Power — was founded in New York. One of its most iconic images was the pink triangle, now pointing upward rather than downward. The slogan beneath it read: Silence = Death. The inversion was deliberate. The downward triangle had marked victims. The upward triangle reclaimed that history. It turned a symbol of humiliation into a call to resist.

The image spread rapidly. It appeared on posters, buttons, and protests across the United States and Europe. For many people, it was the first time they encountered the history of the Nazi persecution of gay men at all.

Memory, Monuments, and Ongoing Research

Recognition came slowly through official channels. In 1985, West German President Richard von Weizsäcker gave a landmark speech acknowledging various groups persecuted by the Nazis. He mentioned, among others, men persecuted for their homosexuality. It was one of the first such acknowledgments at the highest level of government.

Memorials followed. In 1995, a memorial plaque was unveiled at the Nollendorfplatz subway station in Berlin — a district that had been a center of gay life during the Weimar period. It bore a pink triangle. In 2008, a more prominent memorial opened nearby in the Tiergarten: a concrete block with a small window through which a film loops. The memorial was dedicated specifically to the homosexual victims of National Socialism.

In the Netherlands, the Homomonument in Amsterdam was unveiled in 1987. Designed by artist Karin Daan, it consists of three pink granite triangles forming a larger triangle. One triangle points to the past — persecution. One points to the present — commemoration. One points to the future. It remains one of the most visited LGBTQ+ memorials in the world.

Research has continued to complicate and deepen the history. Scholars including Stefan Micheler and Andreas Pretzel have examined local police records to reconstruct individual cases. Their work shows how varied the experiences were. Some men were denounced by neighbors. Some were caught in police entrapment operations. Some were turned in by former partners.

The total number of victims remains uncertain. The figure of 100,000 arrests, sometimes cited in popular sources, is disputed by historians. Lautmann's more conservative estimates, based on surviving records, suggest lower numbers — though he acknowledged that records are incomplete. What is not disputed is that men were systematically persecuted, imprisoned, and killed for violating Paragraph 175.

What the Triangle Carries

The pink triangle carries two histories at once. The first is the history of persecution — the arrests, the camps, the silence after liberation, the men who were never acknowledged. The second is the history of reclamation — the activists who found meaning in that symbol and turned it toward a different purpose.

Both histories are real. Neither cancels the other.

The historian's task is to keep them separate and legible. The Nazi use of the pink triangle was a system of humiliation and control. The later use by ACT UP and others was a conscious act of historical memory and political urgency. Conflating the two flattens both.

What connects them is the insistence that this history should not be forgotten. For decades after 1945, it nearly was. The men who wore the pink triangle in the camps left few testimonies. Many died. Many who survived chose silence — sometimes out of shame, sometimes out of fear, sometimes because no one asked.

Their history is now part of the broader record of the Second World War. It took a long time to get there.