The Duckburg Business School was an institution from Duckburg.
This business school (containing, among other things, a large safe, and a number of attractive female students) fell prey to a freak fire in 1963. The Volunteer Fire Department intervened, Scrooge McDuck among them, and all were saved (safe included, Scrooge has made sure of that with his usual priorities). It is unknown if it was rebuilt.
Behind the scenes
The School appears in the 1963 one-pager A Helper’s Helping Hand.