Germany was the country where The Life of a Showgirl made Taylor Swift the first international artist to debut at number one on both the album and singles charts.
The album topped the German albums chart, while “The Fate of Ophelia” reached number one on the German singles chart at the same time. That combination produced a specific chart milestone for an international artist in Germany.
This fact is distinct from Swift’s overall number-one achievements in other countries. The Life of a Showgirl also performed strongly across Europe and other markets, but the “first international artist” wording belongs to the German chart event.
Country names can be confused because the album had major debuts in Italy, Sweden, the United Kingdom, France, and elsewhere. The question focuses on the simultaneous album-and-singles distinction, not simply the country where the album sold the most units or reached number one.