Pictured to your left is a photo of an event held in the arena that celebration week. I, Voula (my fiancé at that time and now my wife) sat across the table from our long-time friends, Dave and Karen Erickson now living in Denver Colorado. Many TV and other celebrities were also in attendance.
Pictured (right) is an old post card 10 years later (1976) showing the Arena-Auditorium with the Curling Club/Pioneer Hall addition (to the right of the original structure. Docked at the Arena pier on the St. Louis Bay is the Norwegian Training Ship, the Christian Radich of Oslo. A couple of years ago, I was able to again visit that ship docked at it's home in Oslo.
The DECC complex has, of course, expanded and changed in subsequent years. Read more about the 50th anniversary in today's DNT HERE.