What is the history of music festivals

Outdoor music festivals have become a fixture of summertime for many adults. Many different music genres now have their own festivals and some of the largest in the world, such as Glastonbury or Summerfest in Milwaukee, are attended by hundreds of thousdands. While music festivals appear to be a relatively recent development, at least since the rise of Rock and more liberal lifestyles since the 1960s, their history goes back much further. Music festivals have always been about bringing people together to share a common cultural experience through music. This is one common element that has not changed for centuries.