Which one city is know as festival city in world?

Edinburgh, Scotland, is often referred to as the "Festival City" due to its renowned festivals, particularly the Edinburgh Festival Fringe, the largest arts festival in the world. Throughout the summer, the city hosts a variety of events, including the Edinburgh International Festival, the Edinburgh International Book Festival, and the Edinburgh International Film Festival. This vibrant cultural scene attracts artists and visitors from around the globe, making it a hub for creativity and celebration.