The link you followed will bring you to this page:

https://www.eventbrite.com/e/restauri-a-milano-dalla-basilica-di-santambrogio-alla-torre-velasca-tickets-1077363997719?aff=oddtdtcreator&_gl=1*13g9cw2*_up*MQ..*_ga*MTk2OTE0NzY2Mi4xNzMxMDc0OTQ1*_ga_TQVES5V6SH*MTczMTA3NDk0NS4xLjAuMTczMTA3NDk0NS4wLjAuMA