Question: What is the square footage of this mansion in Duluth, Minnesota, operated by the University of Minnestoa Duluth as a historic house museum, indelibly linked with the Congdon name?
Sentence (from "Glensheen Historic Estate"): Glensheen, the Historic Congdon Estate is a 27,000 square foot mansion in Duluth, Minnesota, United States, operated by the University of Minnesota Duluth as a historic house museum.
Relevant evidence: Yes