Kammala jumla mai zuwa: Petra Thümer (daga baya Deckert sannan Katzur, an haife shi 29 ga Janairu 1961) tsohuwar 'yar wasan ruwa ce daga Gabashin Jamus. Ta lashe lambar zinare a tseren mita 400 da 800 na kyauta a wasannin Olympics na 1976 da kuma gasar Olympics ta 1976.
Gasar Wasannin Ruwa ta Turai ta 1977. A lokacin aikinta ta kafa tarihin duniya guda biyar a tseren mita 400 da 800. A cikin 1987 an shigar da ita cikin Hall of Fame na Swimming na Duniya.