Quiz for the weekend: when was this picture taken and why?

I moved to Brussels from my native Milan in 2000. Best decision in my life. 4 children and a lovely wife, Valeria. More on us on www.segantini.net. I worked for 15 year for two global medical associations, the International Society of Nephrology (ISN) and the European Society for Organ Transplantation (ESOT). Now I consult for a variety of organisations, working as a digital nomad. View all posts by Luca Segantini