Oktoberfest is the world’s largest Volksfest. Held annually in Munich, Bavaria, Germany, it is a 16-day folk festival running from late September to the first weekend in October, with more than 6 million people from around the world attending the event every year.
Festival halls in Munich can seat 94,000 people.
Wirtshaus Wiesn in Munich | Alternative to the Oktoberfest
Wikipedia: The Oktoberfest is an important part of Bavarian culture, having been held since 1810. Other cities across the world also hold Oktoberfest celebrations, modeled after the original Munich event.