The Karl Schäfer Memorial (other titles: Asko Cup (1987), Vienna Cup (1994), or Vienna Trophy) was a senior-level international figure skating competition held in Vienna, Austria. Medals were awarded in four disciplines: men's singles, ladies' singles, pair skating, and ice dancing.
Named after Karl Schäfer, who died in April 1976, the competition was held annually, usually in the autumn, from 1974 through 2008. It formed the Donaupokal along with the Penta Cup International (also known as Novarat Trophy), an event in Budapest. The Karl Schäfer Memorial served as an Olympic qualifying competition in 1997 and 2005. It was last held in 2008.