Racing fans from all over the world packed St. Stephen's Cathedral in Austria on Wednesday to bid farewell to F1 legend Niki Lauda ... including Lewis Hamilton and Arnold Schwarzenegger.
The mourners braved heavy rains to get inside the church, where Lauda's coffin was flanked by flower wreaths. His trademark red crash helmet was placed on top.
The 70-year-old passed away last week -- nine months after undergoing surgery for a lung transplant.
Lewis Hamilton has taken Lauda's death particularly hard .