The Pnyx is a historic hill in Athens, Greece, where citizens gathered over 2,500 years ago to practice early democracy. It was the main meeting place for the Athenian assembly, where people would come together to discuss and vote on important matters affecting the city. The Pnyx had a large open space and a raised platform for speakers to address the crowd. This is where citizens made decisions on laws, war, and other key issues, making it a crucial spot in the development of democratic government.