public square, likely in a European city, filled with people

public square, likely in a European city, filled with people. In the center of the square, there's a modern art installation made of light-colored materials and illuminated with purple and blue lights. People are milling around and some appear to be interacting with the art. The background shows a series of light-colored buildings, including a large building with prominent classical columns. A Swiss flag is visible hanging from one of the buildings. The sky is overcast. The overall impression is of a cultural event or public art display taking place in a historic urban setting.