The Holocaust Through Primary Sources: Diaries, Documents, and the Voices of the Past

In a dimly lit archive, a researcher opens a cardboard box and pulls out a yellowed diary, a Nazi decree stamped with an eagle, a photograph of a crowded ghetto street. These are not mere artifacts; they are the raw materials of history. The Holocaust, one of the most documented genocides in history, is known to us through the voices of its victims, perpetrators, and bystanders. As the Federal President of Germany, Frank-Walter Steinmeier, wrote of the 16-volume documentary series The Persecution and Murder of the European Jews, “This series helps us to know, sense, and understand the horror and suffering that Germans inflicted on Jews throughout Europe – from Norway to Greece, and from France to Russia.” Primary sources—diaries, letters, official reports, photographs, and testimonies—are the only direct links to that world. They allow us to hear the fears, hopes, and hatreds of the time, and to confront the gap between what was known and what was done.

What Happened?

The Holocaust unfolded between 1933 and 1945, as documented in thousands of primary sources now collected in archives worldwide. The Nazi regime, after seizing power in January 1933, systematically excluded Jews from German society through laws, decrees, and violence. The Nuremberg Laws of 1935 stripped Jews of citizenship, and the November 1938 pogrom known as Kristallnacht signaled an escalation. With the outbreak of World War II in 1939, the persecution expanded across Europe. Ghettos were established in occupied Poland, and after the German invasion of the Soviet Union in 1941, mobile killing units (Einsatzgruppen) carried out mass shootings. In January 1942, senior officials met at Wannsee to coordinate the “Final Solution”—the systematic murder of European Jews. Deportations to extermination camps such as Auschwitz-Birkenau, Treblinka, and Sobibor followed. By 1945, when Allied forces liberated the camps, approximately six million Jews had been murdered, along with millions of others, including Roma, disabled persons, and political prisoners. Primary sources—from Nazi memos to clandestine diaries—record each step of this process, offering a chronological and personal record of the catastrophe.

How It Was Seen at the Time

Contemporaries understood the events through a fragmented and often distorted lens. Victims recorded their daily struggles and hopes in diaries, while perpetrators used bureaucratic language to obscure murder. Bystanders, both in Europe and abroad, grappled with rumors and incomplete news. The prevailing mood among Jews was one of mounting fear and uncertainty, as expressed by Anne Frank, who wrote in her diary on July 15, 1944: “I still believe, in spite of everything, that people are truly good at heart.” Yet such hope coexisted with despair. Nazi officials spoke of “resettlement” and “special treatment” to conceal genocide. The language of the time—euphemistic, bureaucratic, and dehumanizing—shaped how events were perceived. As the PMJ project notes, the documents “provide unique insights into the persecution and murder of the Jews under Nazi rule throughout Europe,” revealing both the perpetrators’ intentions and the victims’ responses.

Eyewitness Accounts

Eyewitness testimonies are among the most powerful primary sources. They include the accounts of survivors, escapees, and even perpetrators. The United States Holocaust Memorial Museum’s “Experiencing History” platform organizes these voices into sections such as “Jewish Perspectives on the Holocaust” and “Americans and the Holocaust,” allowing users to explore how different groups witnessed events. For example, the diary of a young woman in the Warsaw Ghetto, or the testimony of a Sonderkommando at Auschwitz, provides visceral detail that official documents lack. The PMJ collection includes “diaries, newspapers, minutes, posters, correspondence, regulations” and more, drawn from over 400 archives. These eyewitness accounts often contradict official narratives, revealing the gap between Nazi propaganda and reality. As one survivor recalled, “We saw the smoke from the crematoria and knew what it meant, but we could not say it aloud.” Such testimonies are essential for understanding the human dimension of the Holocaust.

Letters & Diaries

Personal letters and diaries offer intimate glimpses into daily life and emotional states. Anne Frank’s diary, written while hiding in Amsterdam, is perhaps the most famous, but countless others exist. The PMJ series includes “around 10,000 biographies of victims, perpetrators, and third parties,” many drawn from such writings. Diaries were often written in secret, under the constant threat of discovery. They record not only fear but also moments of normalcy—meals, friendships, and small acts of resistance. Letters smuggled out of ghettos and camps provide evidence of conditions and the fate of loved ones. For example, a mother’s letter from a deportation train, or a father’s note thrown from a cattle car, are heartbreaking primary sources. These documents are invaluable because they capture the unmediated voice of the persecuted, free from later interpretation. As the Yad Vashem study pages on “Reading Holocaust Primary Sources” emphasize, such texts require careful analysis of context, language, and intent.

Official Reports

Official documents—Nazi decrees, police reports, railway schedules, and meeting minutes—reveal the bureaucratic machinery of genocide. The PMJ collection includes “official Nazi documents” and “regulations” that show how persecution was organized. For instance, the Wannsee Conference protocol of January 20, 1942, outlines the coordination of the “Final Solution” in chillingly administrative language. Einsatzgruppen reports detail mass shootings with clinical precision. These documents are often euphemistic, using terms like “special treatment” (Sonderbehandlung) to refer to murder. They also reveal the complicity of various state agencies, from the railways to the postal service. However, official reports can be misleading; they may undercount victims or obscure responsibility. Comparing them with eyewitness accounts and postwar testimonies is essential to reconstruct the full picture. The PMJ series, with its “5500 documents translated into English from 21 languages,” provides a comprehensive basis for such analysis.

Different Perspectives

Jewish Perspectives

Jewish sources—diaries, community records, and underground newspapers—document the experience of persecution from within. The USHMM’s “Jewish Perspectives on the Holocaust” section includes materials from ghettos, hiding places, and camps. These sources reveal the strategies of survival, resistance, and cultural preservation. They also show the diversity of Jewish responses, from religious observance to political activism.

American and Allied Perspectives

American witnesses, journalists, and diplomats recorded their observations and reactions. The USHMM’s “Americans and the Holocaust” section includes reports from journalists, letters from citizens, and government documents. These sources show what Americans knew and when they knew it, as well as the debates over intervention and rescue. For example, the 1943 Bermuda Conference and the establishment of the War Refugee Board are documented in official records. These perspectives are crucial for understanding the international response.

Perpetrator Perspectives

Nazi officials and collaborators left behind orders, reports, and even personal letters. These sources reveal the ideology and rationalizations behind the genocide. The PMJ collection includes “minutes, posters, correspondence” from perpetrators. While these documents are deeply disturbing, they are essential for understanding how ordinary people became complicit in mass murder.

What the Sources Got Wrong

Primary sources are not infallible. Contemporary reports often contained errors, exaggerations, or deliberate falsehoods. For example, early Allied reports on the camps were sometimes dismissed as propaganda. The 1944 Vrba-Wetzler report, which detailed Auschwitz, was initially met with skepticism. Conversely, some Nazi documents understated the scale of murder for security reasons. Eyewitness accounts could be affected by trauma, memory, or limited perspective. The PMJ project’s annotations help correct these issues by providing “context for the people and events mentioned.” Modern historians cross-reference multiple sources to identify biases and fill gaps. For instance, the number of victims at a particular camp may be revised as new evidence emerges. Thus, while primary sources are indispensable, they must be critically evaluated.

How Historians See It Today

Contemporary understanding of the Holocaust was often partial and shaped by wartime conditions. Today, historians use the vast array of primary sources to reconstruct events with greater precision. The PMJ series, with its “over 45 maps” and “10,000 biographies,” represents a major scholarly achievement. Historians now emphasize the centrality of primary sources in challenging myths, such as the idea that the Holocaust was a secret or that ordinary Germans were unaware. The shift toward social history has also highlighted the experiences of previously marginalized groups, such as women and children. The USHMM’s “Experiencing History” platform and Yad Vashem’s study pages reflect this evolving scholarship. By engaging directly with the documents, historians continue to refine our understanding of the Holocaust, ensuring that the voices of the past are not lost.

The primary sources of the Holocaust are more than historical evidence; they are a moral imperative. They demand that we confront the depths of human cruelty and the resilience of the human spirit. Through diaries, letters, official reports, and testimonies, we hear the voices of those who lived through the unthinkable. They teach us that history is not a distant abstraction but a collection of individual lives, each with a story that must be remembered. As we study these documents, we honor the dead and commit ourselves to ensuring that such atrocities never happen again.