Question: What was unusual about the venue of the 1957 European Cup Final and 2012 UEFA Champions League Final?
Sentence (from "1957 European Cup Final"): It was the first of four finals (also counting the Champions League era, followed by the 1965, 1984 and 2012 finals) where one of the teams played in its home stadium, and also the first final where the winning team played at their home stadium.
Relevant evidence: Yes