The Reichstag Fire was a pivotal event that took place on February 27, 1933, when the German parliament building, the Reichstag, was set ablaze under suspicious circumstances. This incident played a crucial role in the rise of the Nazi Party, as it allowed Adolf Hitler to consolidate power by framing it as a communist plot, leading to the enactment of emergency laws that suppressed civil liberties and enabled the Nazis to establish a totalitarian regime.