The Reichstag building, the seat of the German parliament in Berlin, was set on fire in a pivotal event in the establishment of the Nazi regime.

The Reichstag is a historic legislative government building on Platz der Republik in Berlin that is the seat of the German Bundestag. It is also the meeting place of the Federal Convention, which elects the President of Germany.

The Reichstag of the Weimar Republic (1919–1933) was the lower house of Germany's parliament; the upper house was the Reichsrat, which represented the states. The Reichstag convened for the first time on 24 June 1920, taking over from the Weimar National Assembly, which had served as an interim parliament following the collapse of the German Empire in November 1918.

The Reichstag fire was an arson attack on the Reichstag building, home of the German parliament in Berlin, on Monday, 27 February 1933, precisely four weeks after Adolf Hitler was sworn in as Chancellor of Germany. Marinus van der Lubbe, a Dutch council communist, was said to be the culprit; the Nazis attributed the fire to a group of Communist agitators, used it as a pretext to claim that Communists were plotting against the German government, and induced President Paul von Hindenburg to issue the Reichstag Fire Decree suspending civil liberties and pursue a "ruthless confrontation" with the Communists. This made the fire pivotal in the establishment of Nazi Germany.

The Nazi term Gleichschaltung, meaning "synchronization" or "coordination", was the process of Nazification by which Adolf Hitler—leader of the Nazi Party in Germany—established a system of totalitarian control and coordination over all aspects of German society "from the economy and trade associations to the media, culture and education".