From her Berlin base, Kurt started her international career, giving successful guest performances at the Royal Opera House Covent Garden, London (since 1910), and during the Salzburg Mozart-Fest in 1910 (which would become the Salzburg Festival later).
Kurt began her worldwide career from her Berlin base, presenting outstanding guest appearances at the Royal Opera House Covent Garden, London, starting in 1910, as well as participating in the inaugural Salzburg Mozart-Festival in 1910, which would eventually become the renowned Salzburg Festival.